Xbox 360 4GB with Halo Reach game bundle. £155 at Tesco Direct.
Use £10 off £50 voucher "TDX-RTHK". If it doesn't work, use a new email address.
3% Quidco for Tesco Direct.
Comes to £140.65.
There is probably some Tesco points to be had as well.
Direct Link - http://direct.tesco.com/q/R.901-7404.aspx