How to Tell If Your Old Coins Are Valuable
Editorial disclosure: this page is educational, not a valuation or an offer to buy. Harry’s Coins is not a financial, tax, or numismatic-appraisal advisor; consult a licensed professional or a reputable dealer for your situation. Some pages on this site link to affiliate partners; this article does not. Last reviewed August 2026.
Short on time? The essentials
- Most inherited jars and rolls are worth melt value plus a few surprise finds. That base rate is not pessimism; it is what dealers see all day.
- The single biggest value lever on a United States coin is precious-metal content. Dimes, quarters, and half dollars dated 1964 and earlier are 90 percent silver; Kennedy halves from 1965 to 1970 are 40 percent silver; nickels dated mid-1942 through 1945 with a large mint mark above Monticello contain 35 percent silver.
- Dates and mint marks matter only when they hit a published key-date list for the series (for example, 1909-S VDB Lincoln cent, 1916-D Mercury dime, 1893-S Morgan dollar). The mint mark is a tiny letter on the coin; its location changes by series.
- Condition is graded on the 70-point Sheldon scale. A common date in Gem Mint State can outsell a scarce date in worn condition. Cleaning a coin destroys grade and value; do nothing to the surface.
- A true mint error (doubled die, off-center strike, wrong planchet) is created inside the mint and repeats predictably. Post-mint damage (dings, cuts, corrosion) subtracts from value.
- Certification by a recognized third-party grading service is worth the fee only when the certified premium is larger than the fee plus shipping. On most common material, raw beats slabbed.
- Whole series (1943 steel cent, 1943 to 1946 zinc-coated cents, common wheat cents after 1934, most Kennedy halves after 1970) circulate at face value or a small novelty premium, not the four-figure numbers hobby videos suggest.
On this page
- The five-question triage checklist
- Question 1: is it silver or clad
- Question 2: date and mint mark vs the key-date list
- Question 3: honest condition
- Question 4: error or damage
- Question 5: certified or raw
- How to apply the checklist coin by coin
- The melt-floor worked example
- What your coin is probably not
- When a professional appraisal is worth it
- Coin-value FAQ
The five-question triage checklist
Every dealer, auctioneer, and estate appraiser runs the same short sequence in their head when a stranger sets a bag of coins on the counter. The order matters. Precious-metal content sets a floor. Date and mint mark decide whether the coin is a common survivor or a key date. Condition sets the multiplier. Errors and certification decide how to sell it.
Work through the five questions below in order on every coin worth pulling from the pile. Coins that fail question one and question two can go straight into a common-date pile without a second look.
Question 1: is it silver or clad
Precious-metal content is the value floor. A pre-1965 dime, quarter, or half dollar is worth its silver weight even if the coin is worn smooth and the date is common. A post-1964 dime or quarter of the same design is worth ten or twenty-five cents.
The dates and compositions below are the ones that matter for a United States coin sort. Every claim in the table traces to the United States Mint or to the underlying Coinage Act of 1965.
| Coin | Silver dates | Composition | Silver per coin (troy ounce) |
|---|---|---|---|
| Dime (Barber, Mercury, Roosevelt) | 1964 and earlier | 90 percent silver, 10 percent copper | About 0.0723 |
| Quarter (Barber, Standing Liberty, Washington) | 1964 and earlier | 90 percent silver, 10 percent copper | About 0.1808 |
| Half dollar (Barber, Walking Liberty, Franklin, Kennedy 1964) | 1964 and earlier | 90 percent silver, 10 percent copper | About 0.3617 |
| Kennedy half dollar | 1965 to 1970 | 40 percent silver clad (outer 80 percent, inner 21 percent) | About 0.1479 |
| Jefferson “war nickel” | Mid-1942 through 1945, large mint mark above Monticello | 56 percent copper, 35 percent silver, 9 percent manganese | About 0.0563 |
| Silver dollar (Morgan, Peace) | 1878 to 1935 | 90 percent silver, 10 percent copper | About 0.7734 |
| American Silver Eagle bullion | 1986 to date | 99.9 percent silver | 1.000 |
Sources: United States Mint coin specifications; Wikipedia entries for Jefferson nickel, Kennedy half dollar, Coinage Act of 1965. Verified August 2026.
Three quick physical checks separate silver from clad without a scale. Look at the edge of the coin: 90 percent silver dimes, quarters, and halves show a solid white edge, while clad coins show a coppery brown stripe. Silver coins ring high and long when tapped against another silver coin; clad coins thud. Silver coins do not stick to a magnet, but neither do most copper-nickel clads, so the ring test is more useful than the magnet test alone.
Question 2: date and mint mark vs the key-date list
Every collectible series has a short list of scarce dates and mint-mark combinations that drive the market. The rest of the dates trade close to a common-date price for the series. The date on the coin is legible on the obverse; the mint mark is a small letter (or no letter, meaning Philadelphia on most series) whose location changes by series and by decade.
A very short sampling of the most-asked key dates. Lincoln cents: 1909-S VDB and 1914-D. Mercury dime: 1916-D. Washington quarter: 1932-D and 1932-S. Morgan dollars: 1893-S and 1889-CC. Indian Head cent: 1877. Buffalo nickel: the 1937-D three-legged. A published key-date reference or the series-specific pages on this site list every combination that matters for the series in front of you.
Two structural cautions before you start pulling “valuable” coins from the pile. First, a scarce date in a badly worn grade is often worth less than a common date in a nice uncirculated grade; condition beats date on many series. Second, some series are commonly counterfeited at their key dates (1909-S VDB cent, 1916-D Mercury dime, key-date Morgan dollars). A raw “key date” from an unknown source deserves professional authentication before you celebrate.
Question 3: honest condition
Coin grading is the 1-to-70 Sheldon scale. Circulated grades run from Poor 1 up through About Uncirculated 58. Mint State grades run from 60 (unworn but ugly) up to 70 (visually perfect). Grade multiplies price sharply on the top end: on many series, one point of grade from MS-64 to MS-65 doubles or triples the price.
Assess condition honestly before you start dreaming. Hold the coin under a lamp and rotate it. Look for wear on the highest points of the design (the hair on Liberty, the cheekbone, the eagle’s breast feathers, the shield lines). Any smoothing or flattening on those spots means the coin circulated, which caps it below the Mint State grades where the big money lives.
Never clean a coin. Any dip, polish, wipe, eraser, baking soda, ultrasonic bath, or soft cloth on the surface destroys the original mint luster. Graders use that luster to place a coin on the ladder.
A cleaned coin comes back from third-party grading with a “Details” label instead of a numeric grade. It sells at a fraction of the straight-graded price. A crusty, original coin almost always outsells the same coin after amateur cleaning. If you inherited a collection, do nothing to the surfaces before an expert looks at them.
Question 4: error or damage
The word “error” is used casually online to describe anything unusual on a coin. In numismatics, a true mint error is a defect created inside the United States Mint during the striking process. Post-mint damage is anything that happened to the coin after it left the Mint. Only the first category has value.
The main categories of real mint errors are short:
- Doubled dies: design elements struck twice with a slight offset. The 1955 Lincoln Doubled Die Obverse is the classic.
- Off-center strikes: the design shifts so part of the planchet is blank.
- Wrong-planchet errors: a coin struck on the wrong blank (a dime on a cent planchet, for example).
- Broadstrikes: the retaining collar failed at the strike.
- Clipped planchets: the blank was cut with a curved bite missing.
Real errors repeat predictably and are attributed by number in reference books such as the Cherrypickers’ Guide.
Post-mint damage covers dings, gouges, corrosion, cleaning marks, altered dates, glue residue, hole plugs, and the “doubling” caused by die deterioration (machine doubling) rather than a genuine doubled hub. A single unusual coin without a known attribution is far more likely to be damage than a discovery.
Question 5: certified or raw
A certified coin has been sent to a third-party grading service, authenticated, graded on the Sheldon scale, and sealed in a plastic holder called a slab. The two largest services are PCGS and NGC; ANACS is the third established service. The slab carries a unique certification number that anyone can verify online against the service’s database.
Certification is worth the fee only when the certified sale price exceeds the raw sale price plus the total cost of grading (fee, shipping in and out, insurance both ways). On common circulated material, the grading fee alone often exceeds the whole value of the coin. On genuinely uncirculated or scarce-date material, certification usually pays for itself many times over at sale.
How to apply the checklist coin by coin
The workflow below is what an experienced sorter does on a bag of mixed coins. Doing the steps in this order avoids wasted time on the 90 percent of the pile that will not repay a closer look.
- Sort by denomination and rough era first. One pile for cents, one for nickels, one for dimes, one for quarters, one for halves, one for dollars, one for foreign or unknown. Within each pile, split obviously pre-1965 silver from obviously post-1964 clad based on edge color.
- Pull the precious-metal coins into their own tray. Every 90 percent silver dime, quarter, and half, every 40 percent Kennedy half from 1965 to 1970, every war nickel with a large P, D, or S mint mark above Monticello, and every silver dollar. These have a melt floor regardless of date or grade.
- Scan every remaining coin for the date and mint mark. Compare each date-and-mint combination against a published key-date list for the series. Coins that do not appear on the key-date list go into a common-date pile.
- Examine key-date candidates and any uncirculated-looking coin under a lamp. Look for wear on the high points, original mint luster, and any obvious mint errors (doubled dies, off-centers). Take four photographs of each candidate on a plain gray background before doing anything else.
- Get a second opinion on the standout coins before spending on grading. A reputable local dealer, a coin-club member, or a well-regarded online forum can offer a rough grade estimate from good photographs at no cost. That opinion tells you whether the coin is worth submitting to a third-party grading service.
- Run the grading arithmetic before submitting. Certified sale price at the expected grade, minus raw sale price, minus total grading cost, equals your profit or your loss on that coin. Positive number: submit. Negative number: sell raw.
- Sell the common-date pile in bulk to the best-priced local buyer. Compare offers from at least two shops. Silver piles trade close to melt with a small dealer spread; common circulated cents and nickels trade at face value unless you find a wheat-cent hoarder paying a small premium.
The melt-floor worked example
The floor for a silver coin is a simple piece of arithmetic: weight in grams times fineness divided by 31.1035 grams per troy ounce times the current silver spot price. The dealer paying you will apply a discount to that number to cover margin and refining risk.
What your coin is probably not
Every dealer counter sees the same coins presented as rare finds. They are almost never rare. The list below covers the recurring cases that account for most of the disappointment.
Wheat cents (1909 to 1958): most dates trade at two to five cents each in worn grades. The 1909-S VDB, 1914-D, 1922 plain, and 1931-S are the true keys. A jar of common wheat cents is a novelty item, not a windfall.
1943 steel cents: the wartime steel cent (zinc-coated steel, silver-colored) was made in the hundreds of millions and trades for pocket change to a few dollars in worn grades. The genuinely rare coin is the 1943 bronze cent, a mint error struck in the wrong metal, and it is heavily counterfeited by plating common 1943 steel cents.
Bicentennial quarters and half dollars (1976, dual dated 1776-1976): struck for general circulation in copper-nickel clad by the hundreds of millions. Melt value is zero, collector value is a modest novelty premium at best. Silver-clad 40 percent bicentennial coins were sold only in special Mint sets and carry a small silver premium.
Susan B. Anthony and Sacagawea dollars: struck for circulation in copper-nickel clad. Face value is the ceiling for common dates in worn grades. A handful of scarce varieties exist and are documented; the plain-vanilla dollars from a coin jar are worth exactly one dollar.
State quarters and America the Beautiful quarters (1999 to 2021): struck for general circulation. Common finds are worth twenty-five cents. Silver proof-set versions carry silver melt; specific documented die errors carry small premiums.
Kennedy half dollars after 1970: copper-nickel clad. Face value in circulated grades. The 40 percent silver Kennedy halves (1965 to 1970) do carry a silver premium; every other Kennedy half is a fifty-cent piece.
When a professional appraisal is worth it
Most accumulations do not need a professional appraisal. A careful pass through the five-question checklist above sorts a typical inherited jar into a melt pile, a common-date pile, and (occasionally) one or two candidates for a second opinion. Free or low-cost paths cover most situations: a reputable local coin dealer, a coin-club member, an online forum such as the Collectors Universe forum, or a mail-in evaluation by a national buy-side dealer.
A paid appraisal is worth the fee in a narrower set of situations. An estate large enough to trigger tax filing needs a written fair-market-value appraisal by a qualified numismatist. A collection with obvious high-grade or key-date material benefits from a professional cherry-pick before it goes to auction. The appraiser knows which coins to submit for grading and which to sell raw. An insurance policy on a valuable collection typically requires a written appraisal renewed at a stated interval.
Choose an appraiser whose fee is a flat rate or an hourly rate, not a percentage of the appraised value. A percentage-of-value fee creates an incentive to overstate the collection. A qualified appraiser will typically hold a credential such as membership in the Professional Numismatists Guild or the ANA dealer program. They will give references, and will provide a written report with sourced grade opinions and market comparables.
For readers who arrived here from a metal-content angle rather than a collector angle, a Roth or traditional IRA can hold IRS-approved bullion coins under strict rules. That is a different question with a different answer, covered on the site’s IRA-eligible gold coins page.
Coin-value FAQ
How do I know if a coin is silver without a test kit?
Check the date first: United States dimes, quarters, and half dollars dated 1964 or earlier are 90 percent silver by law under the Coinage Act of 1965. Then look at the edge: silver coins show a solid white edge, while post-1964 clad coins show a copper stripe. A silver coin also rings a long, high tone when tapped gently against another silver coin, while a clad coin thuds.
Are wheat pennies worth anything?
Most Lincoln wheat cents from 1909 through 1958 trade for two to five cents each in worn grades and only a few dollars in uncirculated grades. The genuinely valuable dates are the key-date list: 1909-S VDB, 1914-D, 1922 plain (no D), and 1931-S in particular. A jar of common wheat cents is a novelty item, not a windfall.
How do I look up the value of a specific coin?
Identify the coin (series, date, mint mark), assess the grade honestly against the Sheldon ladder, then check recent sold prices, not asking prices. The PCGS Price Guide and the NGC Coin Explorer publish grade-by-grade retail benchmarks. Recent sold-listing prices on major auction sites give a real-market number, which is usually below retail benchmark and above dealer buy price.
Should I clean my old coins before selling?
No. Cleaning destroys the original mint luster and surface that graders use to place a coin on the Sheldon ladder. A cleaned coin comes back from any recognized third-party grading service with a “Details” label rather than a numeric grade, and sells at a large discount to the straight-graded price. A crusty, original coin almost always outsells the same coin after amateur cleaning.
What is the difference between a mint error and damage?
A mint error is a defect created inside the mint during striking, such as a doubled die, an off-center strike, or a wrong-planchet coin. A mint error repeats predictably across the die and is documented by attribution number in numismatic references. Damage is anything that happened after the coin left the mint (dings, cleaning marks, altered dates, machine doubling from worn dies). Errors add value; damage subtracts.
Are old foreign coins from an inherited collection valuable?
Almost always no. Circulated 20th-century foreign coins from a family jar typically trade at bulk world-coin prices of a few cents each. Value cases exist (silver crowns of the 19th century, gold sovereigns, scarce dates for a specific national series), and they are worth showing to a specialist. Most world-coin accumulations are best sold in bulk to a dealer who buys world coin by the pound.
What is the safest way to sell a collection I inherited?
Photograph and inventory the collection before showing it to anyone. Get a written offer from at least two established local coin dealers. On material valued in the thousands or higher, consider a consignment sale through a major numismatic auction house; the buyer’s fee model reaches a bigger pool of collectors than a local counter offer. Never mail coins to an unknown buyer without insured, tracked shipping and a written offer already in hand.
Does a coin’s age make it valuable on its own?
No. Age alone does not create value; scarcity, condition, precious-metal content, and collector demand do. A Roman bronze from the 3rd century can trade for a few dollars because so many survived. A common Lincoln cent from 1969 with an S mint mark and a genuine doubled die obverse can command a strong premium in high grade. Run the five-question checklist, not the age check.
Sources
- United States Mint. Coin Specifications: composition, weight, diameter, and edge of United States coins. Base reference for weights and compositions used in the silver-content table and the melt-floor arithmetic. usmint.gov/learn/coin-and-medal-programs/coin-specifications. Checked August 2026.
- Wikipedia, Jefferson nickel. Wartime nickel composition (56 percent copper, 35 percent silver, 9 percent manganese), mid-1942 to 1945 date range, and large mint-mark position above Monticello on the reverse. en.wikipedia.org/wiki/Jefferson_nickel. Checked August 2026.
- Wikipedia, Kennedy half dollar. 90 percent silver in 1964; 40 percent silver clad from 1965 through 1970; copper-nickel clad thereafter for general circulation. en.wikipedia.org/wiki/Kennedy_half_dollar. Checked August 2026.
- Wikipedia, Coinage Act of 1965. Statutory basis for the end of 90 percent silver in circulating United States dimes and quarters and the transition to copper-nickel clad. en.wikipedia.org/wiki/Coinage_Act_of_1965. Checked August 2026.
- Wikipedia, Sheldon coin grading scale. Origin (William Herbert Sheldon, 1949), ANA adaptation in the 1970s, and grade-by-grade descriptions for circulated and Mint State grades. en.wikipedia.org/wiki/Sheldon_coin_grading_scale. Checked August 2026.
- Wikipedia, Lincoln cent. Key-date list for the Wheat Cent era (1909 to 1958), including 1909-S VDB, 1914-D, 1922 plain, and 1931-S. en.wikipedia.org/wiki/Lincoln_cent. Checked August 2026.
- Wikipedia, 1943 steel cent. Wartime steel-cent minting figures and the extreme rarity of the 1943 bronze error, with documented counterfeiting patterns (plated 1943 steel cents). en.wikipedia.org/wiki/1943_steel_cent. Checked August 2026.
- Professional Coin Grading Service (PCGS). PCGS Price Guide and Certification Verification. Grade-by-grade retail benchmark values used to run the raw-versus-certified decision arithmetic, and the tool that verifies a slab’s certification number against the label. pcgs.com/prices. Checked August 2026.
- Numismatic Guaranty Company (NGC). NGC Coin Explorer and Verify NGC Certification. Grade-by-grade catalog information, populations, and the online tool that verifies a slab’s certification number. ngccoin.com/coin-explorer. Checked August 2026.
- United States Mint. Counterfeit coin identification. Publisher guidance on common counterfeit indicators for United States coins. usmint.gov/learn/collecting-basics/how-to-detect-counterfeit-coins. Checked August 2026.