Crikey, some Australian members have reported being directed to PayPal to file a dispute even though logged into eBay.com at the time of purchase and attempting to open a case via eBay, but I also know that an Australian buyer (registered in Australia) filed a successful claim against an Australian seller using eBay's Buyer Protection - this was quite a while ago (maybe a year or so?), so some of the loopholes may have since been closed, but it was due to the buyer logging into eBay.com to purchase. From memory, it was an INAD case for one of those deluxe Monopoly sets, the buyer admitted to already owning the set but needed some missing pieces, and the seller received back the buyer's old set, or the set less the pieces the buyer needed 😞 ).

I suspect it actually has more to do with a slightly different factor (whether an eBay case can be opened, I mean), but it's probably better I not elaborate.