Early on in the audio game, I began inserting "No lowball offers, please" in my F.S. listings. I did so because I was often getting emails/posts offering 1/4 to 1/2 of my the asking price, usually w/no other questions about the item. That’s not a negotiation; It’s a drive-by opportunist hoping to find a desperate seller.
The other reason I put that phrase in my F.S. listings is that I’m plugged into the hobby and have a very good idea what different types of gear are selling for. Before even deciding on a selling price, I research that gear category as a last-minute sanity check...maybe things have changed for those who sell X, and I need to know that. Either way, the price I choose is carefully chosen to be market neutral (not too high, not too low), and also to reflect the condition and use pattern of the F.S. item.
I don’t get every single price right. When something isn’t selling, I’ll either reprice it, or take it off the market. Either way, I never accept low balls. Life is too short.
And it goes without saying, so I’ll say it: I also don’t make lowball offers of others.