For people using eBay as a venue for selling their precious collectibles because they can't afford to pay the electricity bill, this is unworkable.
As you say, it's eBay.com for now... and I hope we don't see it here. I would like a better way of dealing with potential scammers, because all that this is doing is withholding money from people who may not be able to afford to post until they receive their payment for an item, particularly if the postage is a killer.