Microsoft Xbox Series X - 1TB - Used Good Condition £337.99 delivered with code (UK Mainland) @ musicmagpie ebay

Could be a good time to buy - the RRP is going up in the Summer

£267 at cashconverters with 12 months warranty.

Also I've usually managed to negotiate a further discount on most of my purchases from them. More of a dice roll in terms of quality but returns are not difficult. (edited)