Like many of the other reviews, I found Changing Hands Bookstore to be a great alternative to the bigger box book stores. They have about half new books (new releases, top sellers) then half used. I got 5 used books for $40, and they were all in great condition. I'm impressed with their selection, and the store is very organized.
Overall I loved it! The staff is great, and it seems they have LOTS of wonderful events and author readings.