It seems your local Best Buy may be one of the stores that take in used games from consumers reports TomsGuide. The major retailer for all things electronics for consumers is now taking trade-ins for games in-store only. Be forewarned, those of you with multiple copies of game (thought I am not sure why you would have more than one *wink *wink), you will not be able to trade in more than three games of the same title in a year. If you do, they will not return the excess games you trade-in.
Overall, this could be a good thing for many consumers with older games. Considering this is in-store only, the pricing could be different than what you may find at your local GameStop. Be sure to check your local listing of stores that are participating in the trade-in here.