I would think no more than £2,250 tops for an immaculate low mileage bike - with FSH book too.
Remember its a carbed model - so if wanting a commuter in the winter - you could have potential carb-icing probs (which are reasonably easily solved - ish)
Its due its 2 year belt service this year- so if really keen - get that chucked in too
Otherwise £1,800 ish.......
C