5 Dollars (Jackie Robinson)

The 1997 Jackie Robinson $5 Gold Coin

In 1947, Jackie Robinson walked onto a major-league field and changed America. Fifty years later the U.S. Mint honored him in gold — and collectors stayed away in droves. Only 5,174 of the uncirculated coins sold. That flop turned a $180 souvenir into the key date of the entire modern commemorative series.