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Type and rarity of the error
A dramatic doubled die or major off-center strike is far scarcer than a common die chip. The specific mint error, and how many are known, sets the ceiling on value.
Error Coin Appraisal
Find out whether your coin holds a genuine, valuable mint error. Our numismatists review your photos, authenticate the error, and hand you an honest number with no obligation to sell.
An error coin appraisal is an expert assessment of a coin that left the mint with a genuine mistake. First it confirms what you have: a true mint error that happened during production, a collectible variety, or ordinary post-mint damage that carries no premium. That distinction is the whole appraisal, because damage is often mistaken for a valuable error.
From there, an appraisal comes in two kinds. An informal appraisal is a fast, free estimate of market value, ideal when you want to know what a coin would sell for today. A formal written appraisal is a signed document used for insurance, estate settlement, or tax purposes. Most people start with a free informal valuation: send photos and details, and a professional numismatist returns a clear estimate, usually within 48 hours.
Because mint errors are easy to fake and easy to confuse with damage, they need real, clear photos to authenticate. Value is almost entirely numismatic here, not melt, since collectors pay for the mistake, not the metal. If your coin turns out to be a scarce date rather than an error, our rare coin appraisal takes it from there.
Six factors decide what an error coin is worth. We weigh all of them, then show you the math.
A dramatic doubled die or major off-center strike is far scarcer than a common die chip. The specific mint error, and how many are known, sets the ceiling on value.
Errors are a visual hobby. A bold, obvious error with strong eye appeal sells for more than a subtle one, even when both are technically the same mistake.
An error coin is still graded on the Sheldon scale from circulated grades up to Mint State MS-70. Higher grade and original surfaces lift the price within any error type.
The same error on a widely collected series such as Lincoln cents or Morgan dollars usually brings more than on an obscure issue, because more collectors are chasing it.
Errors are heavily faked, so genuine mint errors need to be confirmed and correctly attributed. A PCGS, NGC, ANACS, or CAC mint-error designation removes doubt and raises value.
Recent results from Sullivan Numismatics, Heritage, and GreatCollections, plus the MintErrorNews price guide, show what buyers actually pay for a given error today.
You do not need to drive to a coin shop or mail anything to get started. Our online error coin appraisal takes three steps:
One rule worth repeating: never clean your coins before an appraisal. Cleaning removes original surfaces and can cut value sharply, and it can also destroy the very detail that proves an error is real. Leave coins in their holders, and use a loupe to inspect the date, lettering, and edge before you send photos.
From doubled dies to off-center strikes and clipped planchets, here is the error coin list we authenticate and value.
Doubling of the design from the die itself, seen in the lettering or date. The 1955 and 1972 doubled die cents are the classic references.
Coins struck off the die center or without a retaining collar, so the design is shifted or spread wide. Value climbs with how far off center it sits.
Blank, clipped, or wrong planchet errors, including missing clad layers and coins struck on the wrong denomination blank.
RPM errors where the mint mark was punched more than once, and overdates such as the 1942/1 Mercury dime.
Raised lines from cracked dies, blob-like cuds at the rim, plus double strikes, brockages, and die-cap errors.
Rare mismatched-die mules and double-denomination strikes, among the most valuable mint errors of all.
Errors are the hardest coins for a casual seller to value, which is exactly why some buyers count on you not knowing what you hold. Protect yourself with three habits:
A free appraisal costs you nothing and gives you the one thing every confident seller has: an honest, independent number to measure every offer against.
Request Your Appraisal
Fill in a few details and add photos if you have them. An expert reviews your submission and sends back an honest valuation, usually within 48 hours.
Submit clear, well-lit photos of both sides plus close-ups of the error area to a professional numismatist. Because errors are easy to fake and easy to confuse with post-mint damage, real photos are essential to authenticate them. Our free online error coin appraisal reviews your images, confirms whether it is a genuine mint error, and gives you an honest value with no obligation.
First identify the exact error type, then judge its grade, eye appeal, and how many are known. Compare recent realized auction prices and specialist references such as the MintErrorNews price guide and PCGS for the same error on the same coin. Because value depends so heavily on authentication and attribution, a free expert appraisal from photos is the most reliable way to price an error coin.
The headline errors include the 1943 copper Lincoln cent (over $1 million), the 1975 No-S proof Roosevelt dime (around $450,000), the 2000 Sacagawea and Statehood quarter mule (around $102,000), and the 1942/1 Mercury dime overdate (around $120,000). Most errors are worth far less, but dramatic doubled dies and off-center strikes on popular series can still command strong premiums.
PCGS and NGC are the two most widely trusted third-party services and both attribute and slab mint errors; ANACS is also well regarded for errors and varieties, and CAC can add a further quality endorsement. For high-value errors, a grade and mint-error designation from PCGS or NGC gives buyers the most confidence. Our guide to <a href="/coin-grading/">coin grading</a> explains how the process works.
You can get a free online error coin appraisal right here. Send a few clear photos and details through the form below and a professional numismatist returns an honest valuation, usually within 48 hours, with no pressure to sell. If you have a mix of coins beyond errors, our <a href="/coin-collection-appraisal/">coin collection appraisal</a> covers the whole group.
Use an independent appraiser who is not the same party trying to buy your coins, get the value in writing, never clean the coins, and compare more than one offer. Authenticate genuine errors through a service like PCGS or NGC before selling anything of real value, and see <a href="/where-to-sell-coins/">where to sell coins</a> so you deal only with reputable buyers.
No pressure, ever
Get a free, expert error coin appraisal today and find out whether that odd-looking coin is a genuine, valuable mint error.