MD, where I come from my word is worth all the money I have.
If I post sold and then don't honour it, trading on a board becomes impossible, not to mention in real life or business.
There is a 'loss of opportunity' for the seller when someone posts sold - the seller is free to pursue it as he sees fit within the framework of the marketplace. Sedo / Afternic will BAN a user for non-payment.
I don't even want to count the number of times that I've taken a loss coz I'd given my word, for whatever reason.
90% of the agreements I've had have been about someone saying 'yes' and sticking to it. The 10% who don't stick to commitments, I don't do business with, ever again.
But then that's just me. And before you go around calling people names for your mistake I think you need to take a deep breath and analyse it from a distance. Is this something you want associated with your name, specially on this board and specially in this business?