Blockbuster have preowned consoles in their deal of the week at the moment.
Wii Console £69.99
(most include wii sports, depending if the seller traded it in with it)
40GB / 80GB/ 60GB all £149.99
120GB Slim £199.99
DS Lite £59.99
DS Orig £29.99
All Variations (except go) £59.99
All are In-store only & come with a 6 month guarantee.