I so agree, greenfinch. My next offer will be for three rather rusty bikes. I do occasionally get people not turning up, and I now bombard them with emails giving them increasingly weird suggestions as to why they may not have turned up. It makes me feel better.
'If you can see signposts for Derbyshire you are 200 miles out of your way', that sort of thing. Even if I don't like an item when I turn up to collect it, I simply re-advertise and am less economical with the truth in its description. I have been astonished at what goes, I have advertised things and people have turned up and taken away things like building rubble that we had been about to take to the tip!
The ones I hate are the beggars. Or beggers. They give you 100 good reasons why they should pick you, and later on you discover that they have lied. One woman said that her house had no curtains in her children's rooms, they were cold, had no heating, her brother would be around to collect them as she didn't have a car.
The brother came to collect the curtains, they were for his new flat! He hadn't a clue that his sister had used her children to emotionally blackmail me into choosing her. I don't bother now, first come first served.