Was in PC World today looking for King Kong (well you never know) and they have some 360 games stickered "Half Marked Price".
There were around 5 or 6 and the ones I remember are listed below. I have also shown the current cheapest price on Find-games
Superman Returns - stickered £25 so £12.50 (findgames £26.99)
Eragon - stickered £25 so £12.50 (findgames £17.99)
GRAW Classics edition £20 so £10 (findgames £14.99)
There were some £40 games with half price stickers but not anything too recent.
Didn't confirm the price at checkout as I already have Graw still to play!!
Not available online INSTORE ONLY