I have a situation right now where a one-word domain had an inquiry, and I quoted $15K. He said I had to significantly lower my asking price and that "this is a one time offer, after we decide on our new brand, we're done and not coming back". Said no.
Two weeks later he posts on linkedin about their new brand name with a shitload of hashtags like #brand #brandidentity etc, etc, and then people proceed to comment saying how much they love the new name.
Price just went up. Thank you.