[swarmee]

If it's been graded by PSA, and it's past the return window, the seller could tell you to take it up with PSA. Or he could take the return and try to return it to his own seller or go to PSA himself.

Kind of reminds me of the thread where we discussed the theft of some rare caramel cards that were summarily sold to a dealer and spread amongst the National buyers/sellers. The theory at that time was that "good title" was not conveyed during the sale because they had been stolen. So the cards were supposed to be rebought by the sellers until they made it back to the dealer who bought the stolen cards. I'm not sure that concept is in play here, but as PSA has a grade guarantee, I'd call them first.