I found the Initial D 3-volume set for $4.97, actually at RadioShack. A while back RadioShack released an Initial D edition Zip Zap mini-RC car, and as part of the promotion started selling the manga as well. The manga sales were less than stellar so the set was devalued, but you can likely find a store in your area that still has them.
Speaking of cheap manga/anime, I was at a Border's Outlet store near Columbus, OH. Their line was thinner than I'd hoped. On the anime side, they had several DVDs of Hamtaro, Ranma 1/2, and (I think) Ceres: Celestial Legend, but that was about it. They were priced well, but for my liking, Hamtaro was too kiddy, Ranma seemed too nudey, and without knowing a little more about Ceres beforehand I was about afraid to try it.
I did find some inexpensive manga that looked interesting, though. I picked up 2 volumes of The First President of Japan for $1.99 each. I wasn't too familiar with the series, but being a bit of a political science junkie it looked interesting. Maybe I'll get to report back on that.