Thanks to everyone for the suggestions! I went to Evan's yesterday to pick up a few supplies and Evan is a super nice guy. I love the fact that they have trading days in the store, and I'll definitely be going back. I'm going to try Riverside next as Evan didn't seem to have a lot of common / singles boxes to dig through.
My website: http://www.thesportscardguy.com/ (w/blog, want & trade lists & TTM successes)