How much is a willy mays autographed baseball worth?

Willie Mays single signed baseballA Willie Mays single signed Baseball is worth about $150. - $250. Signatures Authenticated in person by reputable companies like Steiner Sports will sell for more.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.