Baseball cards are a multi-billion-dollar industry appealing to collectors all over the world, with the most valuable baseball cards selling for over a million dollars. The value of baseball cards ...

Topps has been making baseball cards since 1952, the collector's market is willing to pay top dollar for some of them.

A 1952 Mickey Mantle baseball card sold for more than $12 million is considered the most expensive piece of sports memorabilia ever. A "Magic: The Gathering" card sold for $3 million in April; a ...