Though one could easily make a case for other 1950s cardboard of the Mick, his 1956 Topps card wins out for two reasons. One, the 1956 Topps set is simply phenomenal. And two, 1956 was Mantle's ...

For investors seeking liquidity, trading cards provide entry points at almost any price level. While seven-figure Mickey Mantle and Pokémon Illustrator cards dominate headlines, investment-grade ...