Does anyone have a recommended process for investigating one’s own cards for possible alterations? For example, if I bought a Psa 6 graded card in 2014 are there certain internet references that people can recommend I go to look for that same card in a possibly lower grade and/or raw prior to my purchase? I have access to Worthpoint and VCP but if anyone has any other sites I would appreciate your input. Thanks.
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Contact me if you have any Dave Kingman cards / memorabilia for sale.
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