Wal-Mart has done this before. Those gypsy swines. 
 
I wasn't even interested in that game all that much. The co-op looks like fun, but none of my friends are getting it for 360. But now I feel even more inclined to get it cause it's so cheap! So now I'll spend all day on the 11th freaking out at work if I can get out in time to get it or find it around here.