I moved house recently so sold a number of items in a clear-out. I used a dedicated selling site (I'm not in the uk) that only allows direct contact between the buyer and seller once the seller has accepted an offer on the site - which reduces contact with numpties!
It was generally fine until the washing machine - it was the last item I listed as I needed it until just before the move, as a result i priced it low for a quick sale. I said as much, that I needed it gone by Tuesday, and that the buyer needed to be able to carry it out of the house and transport it themselves.
Lots of interest - first asking price offer was from a lady who would collect the next day and thought that between the two of us we could carry it out to her car. I explained I was 7 months pregnant and that as stated in the ad, the buyer needed to be able to move it. She tried to convince me to help, I said no that I would go to the next buyer. She then said she would get her son to collect it on Friday. I said no, again as stated it needs to be gone by Tuesday. Fine she said, I'll collect it from your new house. I explained everything was going into storage. She said grand I'll see you Friday we can arrange to get it from storage. In the end I nearly had to tell her to feck off!
Accepted next offer, got in contact with buyer, she wants to come right away. Sent her my address, she rang and said "oh I didn't realise you lived there, I'll have to take €30 off the price for petrol". The location is on the bloody ad. I told her to feck off a lot quicker and she did come in the end with the full price, a van, and 2 burly lads thank goodness.
On the buying side I was on the lookout for a double buggy. So many people want nearly all their money back! Lady close to me advertised a relatively new model buggy, obviously didn't use it much, and says that as it's such good condition and she paid €570 for it she won't accept any less than €500. I point out that it's currently available from boots for €450 and would she reconsider her price. Got a firm no, she paid €570 so she couldn't let it go cheaper. Can't bloody argue with that logic.