How much would a mickey mantle autograph be worth
That would depend on many things. Is it a ball, baseball card, napkin, piece of paper, photo, is it graded, do you have a certificate of authenticity?
Most Valuable Price.
The Mickey Mantle autographed picture will vary in sizes. A signed 8x10 photograph is priced around $150 - $300. The prices may vary from one store to another and also the condition of the photograph.
I don't know the exact price of it but there are sites out there with price guides for high end stuff like that, if its a card try Beckett.