eBay

I bought a doll from NSW. It was faulty. I initiated a 'Return the Item'. The seller accepted that, but I was sent an address in China (which can't be located on a map either). Also, I got an Ebay notice that the seller can't send a return post stamp...

Does anyone know: If I buy a $70 item from China with free post, is there likely, or possibly more charges added besides the 10% import duty?

Refering to the use of the 10% off Vouchers: The terms of use say that you can make several purchases in one transaction. I'm wondering if that would work if the purchases were from different countries.