From the perspective of the seller, the buyer who orders his merchandise and then changes his mind and doesn’t pay, or the buyer who is a kid prankster who is just playing games - again, orders, sends multiple e-mails regarding every nitpicking aspect of the item he has purchased until you realize he was never serious in the first place and that he has numerous complaints from sellers for the same chicanery. (He then sends a final HA HA e-mail that says “gotcha”.) The most fun buyer is the one who “buys” an item and then twists himself into contortions throwing up difficulties and mind-changes about size, color nuance, etc. and then keeps on until you realize he is jockeying to get you to send the item to him for free. (This is just from watching my husband selling on e-bay; I’m sure he can add to what I’ve said about some buyers. Not being able to warn other sellers off these types of buyers isn’t going to set well with him if it’s true.)
I once watched some buy bid up and up on a piece of stereo equipment I was selling. He kept outbidding another buyer right up until the auction ended. Within minutes, he e-mailed me to say he changed his mind and didn’t want it. And then you have to wait a couple of weeks and fill out all sorts of forms to get your final value fees refunded. It’s ridiculous that you won’t be able to warn other sellers about those types.