I sold an A1200 keyboard on Amibay yesterday and then noticed the money wasn't in my account this morning because I'd made a typo in my email address when communicating with the buyer.
I Sent the keyboard in good faith considering that it was my mistake and messaged the buyer to cancel the transaction and send it the correct address.
I Got in this evening and checked Amibay and he'd sent the money and also asked me to confirm that I'd got it for his own peace of mind.
I expect that most people there would behave the same way so you should not tar everyone with the same brush due to a bad experience.
