Found in Blockbuster, COD: WAW only £19.99 for xbox 360
Unsure if pre-owned or not... but first time I've ever seen this game under £20..
Perfect timing as the new map pack has been relesed!
(This replaces Blockbusters previous offer of Gears of War 2 for £9.99)
PS. This is my first post, so go easy on me if I did anything wrong ;-)
EDIT: Now confirmed for PS3 and is pre-owned stock.