GAME are offering a significant deduction on the price of a 3DS if you trade in a console to them. The prices you have to pay for the 3DS are as follows:
DSi XL - £124.99
DSi - £154.99
DS Lite - £189.99
Wii Console Black/Red - £159.99
Wii Console White - £179.99
PSP 3000 - £179.99
PSP Slim & Lite - £184.99
PSP Base - £189.99
Xbox 360 Arcade - £179.99
Also, if you trade in a DSi XL with any Mario Game, GAME offer you a half-price 3DS.
Good deal, considering that many other places, including GAME, are selling the 3DS for £229.