KB Toys -- Buy one get one free (YMMV)
 

Someone at cheapassgamer.com reported that a number of KB Toys stores are having a Buy one get one free sale on all of their video games. Since this sale is only going on at certain locations, it would probably be a good idea to call ahead.

The store I visited in central Georgia (Macon) was participating in the sale but the selction was fairly small. The GBA and DS were the only systems with a decent number of games available. For at total of about $47 I picked up:

Tiger Woods (PSP)
FIFA Soccer (PSP)
NFL Street (PSP)
Ape Escape (PSP)

EDITED TO ADD: Don't expect to find any Xbox 360 games or any releases from the past few weeks (other than Mario Kart DS possibly).