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R- 1989 Topps Mark McGwire #70 Error Card - wrong weight - 220 & Miscut
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30 Most Valuable 1989 Topps Baseball Cards - Old Sports Cards
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Overanalyzing Goudey, part five – SABR's Baseball Cards Research Committee
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Completed set – 1999 Topps
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Ellis Burks - Baseball Cards - The Baseball Cube
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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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Scott Bankhead - Baseball Cards - The Baseball Cube
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1989 Topps Mark McGwire #70 Oakland Athletics Values - MAVIN
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Larry McWilliams - Baseball Cards - The Baseball Cube
Stock Photo displayed. Actual item may vary. Oakland Athletics
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1989 Topps #70 Mark McGwire
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1989 Topps #3 Gary Carter RB/Sets Record for/Career Putouts - NM-MT
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Scott Bankhead - Baseball Cards - The Baseball Cube
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Baseball - Mark McGwire Master Set: 262 Runner Set Image Gallery