What is the value of an Alex Rodriguez signed Seattle Mariners baseball with certificate of authenticity?
An Alex Rodriguez single signed baseball is worth between $250.-$400. Value is based on average prices of recently closed auctions. Prices may vary based on condition, and the type of authenticity that accompanies the baseball. Signatures that have not been properly authenticated could sell at half the market value or less. Add for inscriptions. If the signature is on a "Seatle Mariners" souvenir baseball it could be have less value than an Official Major League Baseball. In a recent auction (April 2008) an Alex Rodriguez single signed baseball sold for $358.50 For more prices on single signed baseball see Related Links below.