Probably many who have sold things on websites have encountered the fact that the buyer calls, promises to come, and then changes his mind. I found a solution: first I set for myself the minimum amount for which I would give a thing, say, 2000, and in the announcement I raise it and bet 2200. When the buyer calls, I specify his price, allegedly forgot how much was stated in the ad, and call 2000. No one has fixed it yet, and everybody thinks it’s luck, and I need to take it before I get rid of it. They come lightning, drop 2000 and, satisfied with their "deception", leave =)