As you know, GameStop have kicked off a big, big summer sale, with $100 Guitar Hero World Tour band kits just the start. Those looking for smaller boxes can also find a ton of great games, all for under $20.
GameStop are advertising that there will be "thousands" of games for sale under $20, and while they probably mean units of stock rather than actual titles, there's still some good bargains to be had.
Some of the sub-$20 games include:
Brothers In Arms: Hell's Highway
Prince of Persia
And plenty more. Also, it's worth noting the crazy Guitar Hero deal is only for a limited time, with the offer due to expire on July 12. After that, there'll be two more "major offers", one from July 15-17 and one from July 22-25.