What is the most valuable baseball card for a player who played from 1970 or later? - Quora
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1989 Topps Mark McGwire #70 Oakland Athletics Values - MAVIN
1989 Topps Mark McGwire #70 Oakland Athletics Values - MAVIN
Do you have an awesome story of finding old baseball cards somewhere, like an attic or basement for instance, and having them turn out to be really valuable? - Quora
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Baseball Card: 1989 Topps #74 - The Baseball Cube