The only thing stupider than slabbing a freaking video game is slabbing one that's still available in stores.
They don't take care of the games at Walmart. Good luck finding the perfect game anywhere else than this guy.
His SMB DS is a 90, which is NOT perfect (at least, according to VGA). Their '90' is probably equivalent to what you'd find for 1/4 the price at any store. This guy is an ass, plain and simple.