One of the most prized possessions in any collection is an autograph by Yankees Legend: MICKEY MANTLE. While Mantle autos aren't rare by any means, the market is and has been flooded with forgeries.  Many are clueless about Mantle autographs, and the amount of forgeries that are out there. In order to help educate the beginner, I will share the 3 most common forgeries that I see flood eBay everyd…