Heads up from one of the Anonymous GameStop Employee's:
This weekend (actually April 4-6) GS is doing a CoD Ghosts sale:
$40 new on current gen
$30 new on old gen
If you're one of the first people there and buying on I believe Friday, you get posters and the strap that was in the Hardened/Prestige editions of the game. Each store was sent that promo material in the last week to hold for this sale.
Didn't see this posted yet after a cursory search.