I got a new condition Xbox one from CEX not long ago and works beautifully, same for the hard-drives i buy from them, had a 1TB HDD from them for 2 years now and its perfect so
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
don't fall for all the 'CEX sucks' comments, if it faults, return it - no harm done