GameStop in Stockport (possibly other stores too) are selling New Super Mario Bros Wii for £14.99 with selected trade in. Now they have an extensive list for the trade in (multiple formats also) if you ask in store, one of which I remember was TMNT Smash Up (Wii). I ordered this from Amazon for £7.99:http://www.hotukdeals.com/item/583086/tmnt-smash-up-wii-7-99-amazon-free-http://www.amazon.co.uk/UBI-Soft-TMNT-Smash-Wii/dp/B002E9HOA4
and traded in at GameStop Stockport yesterday (31/01/10) for £14.99 bringing the total to £22.98. Now there is an element of risk involved in that I assume the offer could be withdrawn or the games in the list changed but I did it and am most pleased. Just a heads up for bargain hunters out there!