It's a real tough one mate.
It looks like a tenement on wheels from the outside and it needs a couple of jobs doing as per the listing but the tax and private plate must be worth £200 alone and the car maybe £200 itself. Poss £400 at the thick end but you just can't tell with eBay.
The engine and interior are so sweet, it's a crying shame the bodywork isn't as immaculate. Bet it ends up getting broken