Have had same issue.Further to interaction with buyers, what appears to
have happened is that ebay relocated items to outside Australia, one to
Switzerland one to USA. Invoices over AUD100 therefore were charged GST.
One buyer was even invoiced in US...
Having same issue, and to make things worse, one buyer advised that item
was located in Switzerland, another tried to pay invoice and it came up
as US based and invoice was in USDTotal debacle.