There's a huge sale going on right now at Choicesuk including all handhelds and consoles on all of the current generations and some of the past such as ps2, gba and xbox.
I've noticed that the best deals seem to be on handhelds games and accessories but check everything out, as there's 100's of items that have all been lowered and don't forget the 5% vouchercode and 5% for going through Quidco, making some outstanding deals.
One of the games i've noticed is Starfox Command for the Nintendo DS which is now £9.99 - 5% voucher (£0.50p) - 5% Quidco (48p) £9.02 all inclusive.
Hope that helps and remember to list any bargains that you find in this thread. :)