Not sure whether this is in all stores, but here are some of the prices in my local Blockbuster store which is in Dumfries, Scotland. All of these where brand new, by the way.
DJ Hero - £69.99 (PS3, 360 & Wii)
Brutal Legend - £19.99 (PS3 & 360)
Avatar: The Game - £19.99 (PS3, 360 & Wii)
Pro Evolution Soccer 2010 - £22.99 (PS3 & 360)
Operation Flashpoint: Dragon Rising - £22.99 (PS3 & 360)
Tekken 6 - £22.99 (PS3 & 360)
FIFA 10 - £22.99 (PS3 & 360)
They also had some other older XBOX 360 and PS3 games brand new for a tenner or less, such as Legendary and F.E.A.R.
I realise that you can probably find most of these games cheaper online, but they are pretty good prices for being in-store.