This is the other side of the coin, dealing with bell-end sellers:
(Car is on eBay auction without reserve)
Me: would it be possible if I came to view your car Monday or Tuesday, I'm only about 40 minutes away so can come at relatively short notice.
Seller: if you're happy with the car, how much are you willing to offer?
Me: With the greatest of respect, I won't offer until I've seen it, I don't think it's fair on either of us. I'm selling my X5 and have only just started looking at these and liked the look of yours (and you're in Yorkshire too).
I can understand if you're a bit weary of time wasters, I'm going through similar myself at the minute with my X5, but I think it's only fair that I see it before making you an offer.
Seller: Sorry but I'm not prepared to spend time with you viewing the car on these terms. You will have a maximum price you want to pay and that may be much lower than I'm looking for.
Good luck
Me: And how much are you looking for?
Seller: What's the most you'd pay?
I gave up at that point, I thought I could be here for days with this Hampton...