Lowballers
"Thanks but No thanks" works for me
NOW for the caveat...
The jackhole that comes over, asks right off the bat what's the bottom dollar, you tell them, right now $***, then they look over car for an hour +, want to go for a drive, and offer 1/2 or less of the lower number... GTFO a-hole.
I don't even consider offers over the phone. Most of the time they offer something and you say OK, Bring cash. They show up and try to dicker lower... basic offer and acceptance of the sale is already done, bring your agreed amont and pick up your stuff, guess not.