£2,200 seems a high price for a late low mileage 2003 XT600E.
In my humble opinion it's worth £1,800 absolute tops
with a gaurantee and £1,600 without one. This is for a low mileage bike in MINT condition.
If you take the time to have a look, it's now quite possible to find a more modern, newer XT660 for just under £2,500. That puts your £2,200 XT6 in perspective...
My advice - offer him £1,600 or walk. It's a buyers market and there are lots of bargains out there if you look.
PLAY HARD BALL.
Triumph Bonneville 800 (2004), Yamaha XT600E (1999), Honda XBR500 (1986).