They offer to buy, not with the actual intent to buy. All they need is for people looking to seel to see that price and jack up their own, thereby making their own prices seem appropriate. They are trying to manipulate the trade system.
If they argue I usually say more than the normal and prompt them for questions. The worst thing you can do to these people is waste their time. Time not selling is lost money to them. Keep them occupied. If they start cussing you out, which some will, SS and report. Then they will be shut down.
Might not be a bad thing to do when bored one night
