How will it work with eBay?

What are overseas sellers with free postage going to do?

"FREE INTERNATIONAL POSTAGE****

**** Except for Australians. For Australians, 10% of a postage-amount-I-won't-disclose + $5.00"

No.

They're just going to block us.

What about sellers who misrepresent their location? You buy from someone, thinking they're in Australia and that you don't need to pay the tax or the $5.00. And then SURPRISE I'm not in Darwin, I'm in Shanghai and you have to pay.