Just been into Asda (Hunts Cross Liverpool). They had a large "Sale bin" in the games section. Lots of decent titles, most are, or have been cheaper but chronicles of Riddick for £6 and Zombrex edition of Dead Rising 2 for £17 were decent deals. New games, not pre owned. I would imagine most Asda's have similar things on the go. Other games i can remember as I say not the best, but not bad. Modnation racers £18. Tiger woods 11 £15. They mostly appeared to have PS3 games in there.
Sale Bucket Games - Dead Rising 2 Zombrex Edition - £17 / Riddick Dark Athena - £6 + Others @ Asda (Instore)