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warshawlaw1.  I purchased two OJ's that turned out to be laser prints.  NARU'd seller, same as always.  The last raw baseball OJ purchase I ever made.  BTW, the rotten scumbag seller's name is J. G. Henderson from Johnson City, Illinois and he defrauded me in December 2004.  
2.  I purchased a PRO (I know) graded N28 that was trimmed.  Ate a bunch of money on that one.
3.  I purchased a 1953 Bowman Spahn in a CSA 7 holder that turned out to have been altered.  Ate a bunch of money there too.  
The weirdest one I had was a purchase of 3 exhibit cards: a Salutations Gehringer, a Berra and a Kaline.  The Gehringer was real and worth more than what I paid for all three; the other two were reprints.