In my experience, most of the low-ball offers come from people who message you thru Audiogon, not those who make a formal offer on the site.
This reminds me when I had a McIntosh receiver for sale and a very nervous-sounding guy from Ohio went back and forth on Audiogon's messaging with me about issue after issue (will my rack accommodate? will you drive and meet me half way? will you accept $$$? etc.) After a few days of this, a nice young man from Texas made a formal offer, I made a counter offer and the deal was done. When the guy from Ohio saw the unit had sold, he criticized me for selling the unit "out from under him".
This reminds me when I had a McIntosh receiver for sale and a very nervous-sounding guy from Ohio went back and forth on Audiogon's messaging with me about issue after issue (will my rack accommodate? will you drive and meet me half way? will you accept $$$? etc.) After a few days of this, a nice young man from Texas made a formal offer, I made a counter offer and the deal was done. When the guy from Ohio saw the unit had sold, he criticized me for selling the unit "out from under him".