PSA's, SMR price guide has a Lou Gehrig 3x5 index/postcard with an estimated value of about $3,500.
Value will vary based on the grade of the signature, condition of the postcard, overall display "eye appeal" and the type of authenticity that accompanies the signature.
Autographs that are not properly authenticated could sell at half the market value or less. The personal inscription "Best wishes Dick" could lower the value as well. -Steven KeyMan
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