Ken Griffey Jr.'s rookie cards, like the 1989 Upper Deck Star Rookie, hold significant value for collectors, with some reaching over $2,000. The 1991 Topps Desert Shield cards, distributed to soldiers ...

Picture this, It's 1952. A kid in Oklahoma flips through a pack of Topps cards, unaware he's holding a future fortune. Fast-forward 70 years, and that Mickey Mantle rookie sells for $12.6 million—the ...