I recently purchased a baseball with autographs by Mantle and Mays as a gift for my girlfriends son. Apparently he's not such a fan because he listed it right up on Ebay. His Ad got mentioned on this site that it is fake. I see that this site trashes GFA (its grading), but I have compared it to a couple PSA balls and it looks like the exact same autograph to me. Also, the buyer had a rating of over 3000 without a single bad review. How does this this guy that posts know its a fake or does he just automatically assume that GFA is fake. 

The seller will take the return but insists it is real. If it's real I would prefer to keep it