Best used bookstore in town.
I shop for books at Mojo at least once a month. If I let myself, I can spend half a day there browsing the shelves. Last time, I picked up a used copy of Still Life with Woodpecker for $5! I'm not as much into the music area, but a friend tells me it's the best vinyl source in the area. Sometimes I do pick up some used cds and dvds (cheaper than moviestop). They take trades and offer cash too. I sold some textbooks last semester and they offered a little bit more than the campus bookstore offered me.