How to Look Up What Your Coin Is Worth (and Why Book Value Misleads)
What Is My Coin Actually Worth?
"What's my coin worth?" is probably the single most common question in all of numismatics. The answer is more nuanced than most people expect — and the first price you find online is almost never the real answer.
Why "Book Value" Is Misleading
Price guides (Redbook, PCGS Price Guide, NGC Price Guide, Greysheet) publish values for coins at various grades. These numbers are useful as relative benchmarks — they tell you which coins are rarer and more valuable than others. But they are not the price someone will actually pay you for your coin.
Price guide values are typically based on retail replacement cost — what you'd expect to pay when buying a coin from a dealer. When selling, you'll receive significantly less because:
- Dealers need a margin to stay in business (typically 20-40% below retail)
- Grading is subjective — your coin may not grade as high as you think
- Market conditions fluctuate — guide prices may lag behind current demand
- The coin's specific eye appeal, toning, and surface quality affect its desirability beyond the grade number
Where to Look Up Values
Free Resources
- PCGS Price Guide (pcgs.com/prices) — Comprehensive, regularly updated. Based on PCGS-graded coin sales data.
- NGC Price Guide (ngccoin.com/price-guide) — Similar coverage with NGC's grading standards.
- NumisDex Catalog — Browse our catalog to identify your coin's variety and error type, which can significantly affect value.
Auction Records (Most Accurate)
The most reliable way to determine what your coin is actually worth is to look at what similar coins have actually sold for at auction:
- Heritage Auctions (ha.com) — The largest U.S. coin auction house. Their sold prices archive is searchable and free.
- GreatCollections — Another major online auction house with searchable past results.
- eBay sold listings — Filter by "Sold Items" to see actual transaction prices (not asking prices). Useful for common coins but less reliable for rarities.
What Affects Your Coin's Real-World Value
- Grade — The most important factor. One grade point can mean hundreds or thousands of dollars on key dates.
- Certification — A coin graded by PCGS or NGC typically sells for more than a "raw" (ungraded) coin because the buyer has confidence in the grade.
- Eye appeal — Two coins at the same grade can sell for very different prices based on toning, luster, and surface quality.
- Error/variety — Known die varieties and mint errors add premium. Check the NumisDex catalog to see if your coin matches a cataloged variety.
- Market timing — Coin values fluctuate with precious metals prices, collector demand, and broader economic conditions.
The Most Common Mistakes
- Using asking prices instead of sold prices — Anyone can list a coin for any price. Only completed sales reflect actual market value.
- Over-grading your own coin — New collectors almost always grade their coins higher than they actually are. When in doubt, assume one or two grades lower.
- Ignoring condition — "I have a 1909-S VDB" means very different things at AG-3 vs. MS-65. Always factor in condition.