Posted By:
MatthewHe seems to know that his stuff is likely counterfeit.
He lists everything as being sold "as-is".
That's a red flag.
Anyone who would let an Ex+/NM 51 Mantle go for a few hundred bucks obviously knows that the card is not authentic.
With that many quality cards, this guy would have to be a bigtime seller...bigtime sellers don't let a NM 52 Topps Mantle go for $400.