I've always liked HPB since I discovered it in San Antonio, TX. They are like Bookmans (recently reviewed) where they buy and sell books, and have a selection of music and stuff you could spend the day discovering. Make it a few hours trip if you're going and you'll have a blast. They have two valley locations that I've seen (both in Scottsdale area) so if one doesn't have what you're looking for, try the other one.