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A Mickey Mantle signed Baseball card in general is worth about $150. -$300.

Value is based on average prices of recently closed auctions. Prices may vary based on condition, and the type of authenticity that accompanies the signature. Signatures that have not been properly authenticated could sell at half the market value or less Once a collectible Item like a baseball card is signed it looses it's value as such, and becomes an item to display the signature. The bulk of the value now relies on the value of the signature. To the baseball card collector the signature would be considered a flaw in the condition of the card.

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16y ago

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