Just a few off the top of my head: The Outfit ($20), Table Tennis ($20), NBA Live 06, NHL 2K6, College Hoops 2K6, Bomberman: Act Zero, Just Cause (only one I can't seem to snag), Amped 3, Call of Duty, Perfect Dark Zero (LE), Eragon (on Amazon for $16), and a few others can be had for sub $20 using the $5 Gamepro gift card at Best Buy. You just missed a 2 for $30 deal at Circuit City on a good hunk of games as well.
I have an extra of Perfect Dark Zero LE and Phantasy Star Universe new I'm willing to part with as well (/end shill)