I will say that the "negotiators" get irritating when they go too far with stuff that you feel that you have priced fairly. I have a small Snapper 2-cycle snow blower that is barely used. Kind of like this one:
Since a snowblower is a tough sell in June, I had it priced at $25. I had some dude pull up and look at it. He started bad-mouthing it and then finally offered me $10. I told him no way and he got all butthurt about it, muttering "winter is a long way away" as he left.
Actually, snow is only four months away, so I'll wait until then and put it on Party Line for $100.
