Roger Clemens single signed baseballA Roger Clemens single signed Baseball is worth about $100.-$150. Signatures authenticated in person by a reputable company that uses holograms like Steiner Sports will sell at a higher value. 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.
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Roger Clemens single signed baseballA Roger Clemens single signed baseball is worth about $100.-$150. Signatures authenticated in person by a reputable company that uses holograms like Steiner Sports will sell at a higher value.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 such as "CY7".