Way too low.
Avoid it like a virus.
Also I wouldn't buy an item that was at £1 from there, full of scammers and usually the items are not what they say they are.
I tried buying a KIA people carrier, he had it at the price of £1200, when I got the guys place. I wanted to see it running he was avoiding in doing just that, when he did agree it never started. I spent £20 on taxies getting to him and back home but was glad it was just a £20 rather than £1200.
Point is if it sounds too good to be true it usually is and just avoid it, plus I have learnt that an item such as an Iphone 5s you may be able to find maybe up to £30 cheaper than regular going price but not too much.