You've pretty much got all useful bases covered from places to buy from.
Depends which dealer takes the car in, condition, value ex.
Like I had an immaculate merc but it was only worth 3-4k. Traded in at a mitsi dealer.......straight to auction. Would have been a right bargain for someone.
Your looking for a very specific car so hunting the auctions might not be too easy......especially as you don't want a dog and you never can tell until you check the car over personally