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8. 1933 Saint-Gaudens Gold $ 20 Double Eagle—worth $ 8.6 Million
There is an interest story behind the coin. In 1933, when there were calls for coin mintings to be halted during the Great Depression, all gold coins were ordered melted by President Roosevelt. Although many slipped through the net, collectors are bidding up to $8.6 million for one despite it being illegal in the eyes of the U.S. government.