Not sure exactly what you after mileage wise etc but for £1800 and at this time of year your gonna start getting priced out quickly as time goes on. I've seen the odd bargain here and there but very few LWB's..
Problem is mate ive seen sheds go for £1800.. Quick spray job and some nice wheels and they are back on ebay for 3k :*
Not much help i know but i think your gonna have to up your budget if your after something half tidy with lowish miles :ILU:
Good luck with it anyway. Local paper is probably your best bet.