Extra 20% trade-in credit when you trade in any games toward the reservation or purchase UFC 2009 Undisputed:
For those who don't use GameStop, it's great. For $15 a year, you get a subscription to Game Informer (monthly gaming mag - all platforms, even PC) as well as a membership debit card that gives you an extra 10% on all your used trade-in games, and an extra 10% off all used games that you purchase. Every weekend they have a special sale and/or trade-in such as the one posted above. I wasn't planning to get this game, but I have a few video games on the Wii and XBox that I'm considering trading in order to reserve it.