I would say listing the new price for items is super annoying to me.
I don't care what it is new I'm looking at something that is 30+ years old half the time.
It's even worse on machinist tools as people like to list the Auckland's price. I don't bother with these type of people unless the price they set is reasonable.
I looked at buying a 4" brown and sharp machinist level guy didn't list a price for the thing and said in ad make and offer. So I offered him 50$ and he went off on me about low balling him because a new similar one was like 400$ or something and he wouldn't take less then 150$ for it. So I sent him eBay listing for the same level was selling between 35$-75$ on eBay and just told him good luck on selling it and left it at that.
He didn't have any other machinist related stuff for sale so I figured he bought it from garage sale or something and just wanted to flip vintage stuff like the YouTube people do to make quick money.