As stated, problem with pre-order is when you paid Paypal and is way off ahead of the Paypal claim. Its not worth the risk or hassle as you really cannot predict what will happen.

Further to that, if its a scam, thats the end for you. Trust me Paypal would care less as the transaction is considered expired. If its not a scam and there are issues, and the owner refunds the money you can be worse off if Aussie dollar is not as good. I had refunds before and I found myself $5 worse for the same amount refunded.