The board should not be wrapped in anything other than an anti static bag. But it is doubtful that the board was damaged by wrapping it in shrinkwrap, it is much more likely the seller has sent you a bad board from the get go. Buy a "used" motherboard? In my opinion, you are taking a big chance, 50/50. I would never, ever under any circumstances buy a used board, unless it was from someone I knew personally, AND seen the PC running before I bought it. Hope they accept returns.