Only 150,000 of these error coins were released in Philadelphia, with some selling for up to $2,185 at auction.
This coin can fetch between $2.5 million and $7 million in the open market. It is regarded as the rarest gold coin of the 20th century. It was produced in Denver, Colo., hence the D, and also named ...
Visiting Key West on a budget? Here are the best free things to do in Key West, from beaches and historic sites to museums, ...