I was at Costco in Santa Clarita, CA yesterday and they appeared to have gotten rid of almost all of their video games. Here's what they had:
Zelda Spirit Tracks (DS) - $15
Once Upon a Monster (360 Kinect) - $10
Carnival Games (360 Kinect) - $10
SOCOM 4 (PS3) - $18
Steel Diver (3DS) - $13