If it's got a V5 (i.e. Whoever buys it won't have the hassle of having to register it) then I doubt it will be worth less than one the was originally imported to the U.K., the whole "UK bike" thing makes me smile to be honest, all Jap bikes are imports unless they were made for their home market!, true there are sometimes minor differences but nothing that can't be sorted during a restoration, anyway if it's cheap just buy and enjoy and don't worry about resale.