Years back I needed a transmission for an old car I owned. I went to a local garage/junkyard (old term) and found one. I asked about it and the owner said he'd sell, but I had to remove it from the car myself. I replied "OK how much" he said "make me an offer" "$100." I said. "SOLD!" he shouted then turned toward the garage and yelled "Closer er up boys we made it for today!" I've been shy about making offers ever since.
As sellers you have to learn to take some crap. Sometimes a guy is a jerk sometimes he needs to learn. A fellow might see a gun he really likes and it just hits him. He knows nothing about it, but he thinks "if I can I'll buy it". His offer is way low and if you run him off -no sale and his little dream ends badly. A pleasant reply educates and may even allow him to think "can I maybe do this anyway" or you may direct him to another gun you have. When I make and offer I'm not looking for lowered brow and spit, I'm looking for a deal or polite counter offer. Guys who blow off customers don't really want to sell they just want you to know what they think they have that you don't. Who wants to deal with that. Its sorta like being around my buddy when he's ginned up and telling me how when driving his BMW he "wishes everybody else would just get off the road"!