Yup, CEX do the best trade in rates, which are all shown on your website. You can usually play through a game, trade it in for another second hander, and it's cost you a fiver.
These days though I tend to rent newer releases from Blockbuster. With a lot of games clocking in at around 10-12 hours for the campaign, it hardly seems worth buying when I can rent for a fiver.
"His skills are getting faster with Grandpa the master." - Jonas Brothers