It looks like a scam.
The pics come from here:
http://www.bikepics.com/pictures/003930/ According to the profile on BikePics, the owner comes from Edinburgh but the seller is located in London.
The seller registered on the same day as starting selling - 0 feedback, etc.
The description contains no details you would expect to see about the bike other than the manufacturer's spec - where's the service history? Type of tyres? Any faults? Why is he selling? MOT? Tax? etc etc - all the stuff you would normally put into an advert.
So yes, it looks very dodgy.