If you ship it to Australia it's over the $1000AUD gst threshold so it picks up an extra 10% as it crosses the boarder.
If you ship it to Iceland it picks up ~30% in VAT and other taxes, and you have to pay tax on the shipping as well. If the Icelandic customs decide what you've bought was a "luxury good", it could pick up as much as 50% more tax in the process[1].
The USA is not the world. The base price tends to multiply when you ship it elsewhere.
[1] I don't think anyone understands how the Icelandic Customs applies tax, including customs themselves