2. 1970-S small date penny

The 1970-S small date penny looks only slightly different from its large date counterpart, but PCGS notes that the "7" in the date line appears smaller on these coins, and the "LIBERTY" stamp is weak.

1970-S small date pennies with high grades, or mint state (MS), can be worth serious cash — with PCGS putting the record auction sale price at $2,464.

4. 1979 Susan B. Anthony dollar

A 1979 Susan B. Anthony dollar coin without any errors could still be worth some serious cash — especially if you happen to have one in very good condition that would receive an MS rating (which ranges from 60 to 70) in the high-60s.

According to PCGS, the record auction price was $3,819 for a piece sold in 2014.

5. 1971-S deep cameo proof penny

Proof coins are created to serve as models for future coins and extra care is taken when stamping these models. This results in much sharper detail — and proof coins labeled as "deep cameo" even appear to have a "frosting," according to PCGS.

1971-S proof pennies that fit this deep cameo description can be worth thousands — and one sold at auction in 2004 for more than $17,000.

7. 1974-S reverse brockage penny

This is another rarity, but a unique misprint makes these 1974-S pennies worth thousands. The coin has the standard 1974-S Abraham Lincoln markings on the front and a reverse brockage from a 1973-S cent on the back (with another picture of Lincoln).

One reportedly sold for more than $11,000 in 2020.

9. 1970-S double-struck and broadstruck nickel

Another rare coin that could net you a small fortune is a 1970-S nickel that appears to be "double struck," or struck multiple times so that the stamp on the coin looks almost flattened, and broadstruck, meaning the stamp is not perfectly centered.

The rare minting error puts the coin's value at around $2,000.

10. 1973-D double-struck, off-center nickel

Another double-struck nickel from 1973 and minted in Denver could be worth a few hundred bucks. This particular minting error resulted in a second strike that is approximately 75% off center.

A version of the coin is currently being auctioned by Heritage, with a starting price of just under $900.