ask your local sprayer or dent removal man, they will know who's trading locally, granted trade supplied cars are not as plentiful and not as cheap as they were, but they don't come with A- £200-500 indemnity, or B-£200 delivery by a stranger., and of course you get to drive them before deciding / paying.
amazes me how new retailers set up but don't have an interest in the local trade supply, it's a bit like buying a freehouse pub and not knowing where the local brewing companys are, just saying...