Mickey Mantle UDA single signed baseballA Mickey Mantle single signed Baseball is worth about $500.-$800.Value will vary based on condition, and type of authenticity that accompanies the signature. Rare examples of a pristine signature or inscriptions like "The Mick" "HOF 1974" or 536 HR's" could raise the price to the $1,000. price range. Mickey Mantle was under contract with the Upper-Deck company before he passed away. Baseballs that have the Upper deck hologram could sell in the $1,000.-$1,500. price range. signatures that have not been authenticated could sell at half the market value or less.