They'll do a 7 year warranty if you service it with them BUT you have to service it every 4,000 miles or 6 months, whichever comes first, for it to be valid
Price of the bike is good, though I'd check out standard 2yr warranty conditions before buying given the above as I'm sure Suzuki GB won't cover the warranty on an import.
Edit: Hondaman beat me to it whilst I was reading ebay/typing