1: The 1913 Liberty Head nickel, worth $4.5 million.

2: The 1974 aluminum penny, only a few exist.

3: The 1794 Flowing Hair silver dollar, sold for $10 million.

4: The 1804 Draped Bust dollar, a rarity among collectors.

5: The 1787 Brasher Doubloon, one of the first U.S. coins.

6: The 1838 O Liberty Seated half dollar, a highly sought-after coin.

7: The 1933 Double Eagle, valued at over $7 million.

8: The 1943 Copper Penny, accidentally minted in copper.

9: The 1999 Lincoln Cent, with a rare doubled die error.