Baseball cards, like Coca-Cola or Harrison Ford, started as one thing and ended as another. And no one knew it would catch on. The first set of cards in the 1880s was a marketing tool by tobacco ...

Credit: Karina Mahadeo; Steve Hesse "A card is worth ... baseball cards (and other types). "We are looking for rookie cards, autographs, numbered cards, vintage stuff from the '50s, '60s and '70s ...