You can get £34 trade from Gamestation for God Of War 3 - great if you want to get Just Cause 2 or any other game.
CEX will give you £33 trade for god of war 3 or £29 cash - follow this link http://www.tinyurls.co.uk/S896
and print the page. Then take it to Gamestation, they will pricematch it and give you £33 trade plus £1 on top!
Students dont forget 10% of all purchases ;-)
P.S You will need a Cex store near a Gamestation store, i thinks its 1 mile apart max.