2 year warranty makes it worth a buy I think, provided CEX's warranty is worthwhile
GPU itself will probably be fine but would expect vents to be clogged with dust as you get on high performance laptops. Whether they’ve cleaned it depends on the store as some are really good and others literally buy it off some mug for £340 and put it straight back out for £680 - sometimes with the user’s data left on it (true story)!
Could go either way, this. It's a good price for the spec but being a gaming laptop, there's a chance it's been thrashed. No amount of refurbishment is going to sort a battered GPU.
I wouldn’t risk another B-grade from CeX for laptops! I had Dell XPS 15 9550 delivered yesterday in B grade. It looked ‘off’ so I had a closer look. The hinge cover was broken, not sitting flush and the display didn’t look right, on inspection the display had deep scratches on the bottom edge and it became clear that the LCD had been replaced very badly. The bezel edging was stuck down with what looked like epoxy resin that had splurged out onto the panel itself. That was £500 which would have been a bargain but now it needs to be returned... Moral of the story, don’t buy stuff from CeX unless you can physically see it first.