This is the only GameStop I'll shop at. The employees are polite and don't hassle you to make a sale.
The games here a still a little overpriced, but you'll get a fair trade value for current games. I'm happy to give them my business.
Side note:
The manager is my hero... he once called the cops on some negligent mother that had dropped off her kids to play at the store all day, alone, while she went shopping. Kudos to him for not letting some stupid parent get away with that shit!