You found something unusual on a coin. Before you start planning what to do with the money, run through this practical checklist. Most odd-looking coins are damaged, not errors. And most genuine errors are worth less than you might hope. This guide helps you make a realistic assessment.
This is the first and most important question. The majority of coins that people think are errors turn out to be post-mint damage — scratches, dents, corrosion, or coins that went through a dryer or vice. A real mint error happens during production at the mint.
If you are not sure, upload a photo to ErrorHunt for a quick AI assessment, or read our guide on error vs. damage.
Error type heavily influences value. Here is a rough hierarchy:
A 50% off-center strike is worth far more than a 5% off-center. A doubled die visible to the naked eye is worth more than one requiring 10x magnification. Severity matters within each error type.
Errors on popular series and significant dates carry premiums:
Higher-grade coins are always worth more, but condition matters less for dramatic errors than for regular coins. An off-center strike is collectible even in circulated condition. A minor variety is much more desirable in uncirculated grades.
Search for similar errors that have recently sold:
If you cannot find any comparable sales, the error may be too minor to have a market, or it may be genuinely rare and worth professional evaluation.
If you believe the error is worth $50 or more based on comparable sales, professional authentication through PCGS or NGC is strongly recommended. A certified error coin typically sells for significantly more than the same coin raw. Grading fees start around $20–$30 per coin.
If you believe it is worth $50 or more, grading is usually worthwhile. Fees start at $20–$30. For minor errors under $20, the grading fee may not be justified.
Heritage Auctions, GreatCollections, and eBay are the main venues. Local coin shops buy errors too but typically pay less. Always authenticate high-value finds first.
The error may be less significant than you think, the coin may be damaged rather than an error, or your asking price may be too high. Check sold listings for comparable sales.
ErrorHunt provides estimated value ranges based on error type, severity, and market data. These are estimates, not appraisals. For high-value finds, always get professional authentication.
Start here. Upload a photo of your coin and get an AI-assisted assessment of what you might have.
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