1. 1794 Flowing Hair Silver Dollar ($12 million): Believed to be the first US silver dollar, with flowing hair Liberty and American eagle design.

2. 1933 Double Eagle Gold Coin ($18.9 million): Minted during the Great Depression, with only a handful escaping destruction.

3. 2007 "Big Maple Leaf" 100kg Gold Coin ($4 million): The world's first million-dollar coin, a massive 100kg Canadian gold masterpiece.

4. 1787 Brasher Doubloon ($7.4 million): An early American gold coin by Ephraim Brasher, with his initials and unique design.

5. Saint-Gaudens Double Eagle (1907) ($7.6 million): Designed by sculptor Augustus Saint-Gaudens, featuring high relief and artistic details.

6. 1804 Silver Dollar ($4.1 million): A mysterious coin with unclear origins, highly sought after by collectors.

7. 1913 Liberty Head Nickel ($4.5 million): A production error, only five known to exist, with Lady Liberty facing the wrong way.

8. Edward III Florin (1343) ($6.8 million): An incredibly rare English gold coin from the reign of King Edward III.

9. Umayyad Gold Dinar (723) ($4.7 million): An early Islamic gold coin, significant for its historical and artistic value.

10. $1 Million Gold Canadian Maple Leaf (2007) ($4.02 million): A spectacular 100 oz pure gold coin from the Royal Canadian Mint.