Well usatoaus.com replied.......
Price is $275 shipped, which is very reasonable, but it is from there depot in the USA to Melbourne (or Sydney).
So, I have to pay for postage from the seller's house to depot (let's say $100 ground shipping), $275 from depot to Melbourne, $50 landing fee in Melbourne, then $100 shipping from Melbourne to Adelaide. Item is only $90.
It would take 2-3 months all up and 3 lots of shipping and way too many headaches. Total price landed in Adelaide is $615 which is reasonable, but not worth it.
If the guy next door wanted to sell me a roof for $600, I would do it, but not through process above.