I know these get posted alot, but as the Black one I ordered last time was faulty, I waited a bit and tried again for a Crystal version...
Both are pre-owned, and come with required cabling and one controller
XBOX Black - £9.98
XBOX Crystal - £9.99
Both in stock at time of my order/this posting
Dont forget Quidco...There is also a £3 off a £30 spend with the attached Voucher