If this is the parts from the rusty sportshatch for sale in Liverpool then I would take the bidding with a pinch of salt. The same thing happened when it was for sale as a full car. Bid up to whatever you think the items are worth and no higher. If you don't win them you'll probably be relieved later that you didn't pay well over the odds.
Trust your instincts Al, in this case I suspect you're not wrong!