Bookmans is the best used book store that I have been to! All of their items have amazingly low prices, including their electronics, and there is a massive variety of books to choose from. I would be surprised if they didn't have a book I was looking for due to their full walls. Also, this place is ideal for when you need books for school. Most of the time you can even find a book that already has notes in it.
My favorite part of this store is that you have the opportunity to trade in your items for actual money or store credit. Obviously the store credit would always be extremely higher than the store credit, but either way it's a deal. However, they don't always take everything you bring in. They have employees search through your items and pick out what the store could need. This experience has always been beneficial for me. One time store credit allowed me to walk away with two of the newer Xbox One games, and three books. If this doesn't spark your interest I don't know what will!
The customer service is always fast and friendly both at the register and when you need help finding a book. The workers easily find any book you need just by the title. As for the register, the workers have a smile on their face and are eager to help. Sometimes they tell you what they thought about a book as well, which is nice to know. One of the workers also showed me that I could sign up for their teen program, where I could receive credit on my birthday. Who wouldn't want to sign up?