There's also the "you don't live near me and that is your problem, therefore I a) expect you to deliver it to me for free, or b) will offer you substantially less because meeting you would mean I would have to leave my house briefly and the inconvenience could upset my hairstyle" gang on Adverts. I was made an offer on a pedal I was selling with an asking price of €40, they would only buy it if I delivered it to them in Dublin. It would have cost me around €40 in petrol and four hours of my life to do that. Other than that, I was crazy to decline their generous offer, I suppose.
There are some great people on that site but the bad ones really take it to the limit.