Two identical 1909-S VDB pennies can sell for $700 and $5,000. Same coin, same year, same rarity — the difference is grade. Grading is the standardized language collectors and dealers use to describe a coin's condition, and small differences in grade often mean large differences in price.
American coins are graded on the 70-point Sheldon scale, where 1 is barely identifiable and 70 is a flawless coin under 5x magnification. The scale combines a descriptive grade with a number:
| Grade | Name | What It Looks Like |
|---|---|---|
| G-4 / G-6 | Good | Heavily worn; major design visible but flat |
| F-12 | Fine | Moderate, even wear; all lettering readable |
| EF/XF-40 | Extremely Fine | Light wear on high points only; sharp detail |
| AU-50 / AU-58 | About Uncirculated | Trace of wear; most mint luster intact |
| MS-60 to MS-63 | Mint State | No wear, but noticeable contact marks |
| MS-64 to MS-66 | Choice / Gem | Strong luster, minimal marks — where prices jump |
| MS-67 to MS-70 | Superb Gem | Virtually perfect; auction-headline territory |
Professional graders evaluate five things: wear on the highest design points, luster (the original mint shine), strike quality (how fully the design was stamped), contact marks from other coins, and eye appeal — the overall impression, including toning and color. For copper coins, color matters enormously: a "Red" (RD) uncirculated cent commands far more than the same coin toned "Brown" (BN).
PCGS and NGC — the two leading services — charge roughly $20–$75+ per coin depending on value and turnaround. The rule of thumb: professional grading makes sense when a coin is plausibly worth $100+ raw, when you plan to sell at auction, or when authentication matters (key dates and errors attract counterfeits). For everything else, an accurate estimate is enough to know what you have.
That's exactly what our scanner does: snap a photo and the AI estimates the grade and value range instantly — free for your first scans. It's the fastest way to decide whether a coin deserves the full PCGS treatment.
Don't clean your coins — ever. Cleaning leaves microscopic hairlines that graders catch instantly, and a "details" (cleaned) designation can cut value in half. Don't confuse machine doubling with true doubled dies (see our valuable pennies guide). And store anything promising in inert flips or capsules, not PVC pages that damage surfaces over time.
Grading tips, valuable coins to watch for, and collecting strategy — short and free.
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