Refurbished PS4 via Amazon Warehouse
Granted the condition isn't perfect. But this is the cheapest PS4 you can buy from a retailer with a 1yr warranty.
All are "perfect working condition"
Very good: £152.37
Comes with a controller.
Click "read more" to find out more info about your specific unit - so you can get one with least cosmetic damage.
If anyone can beat this for a PS4 with warranty - please do say so!