Nah, it takes into account tax and adds GST if its an issue. It tells you at checkout.
Here in AUS we typically have a 10% import tax right?
But since they have warehouses located domestically both here and in NZ, depending on the manufacturer it often bypasses tax altogether.
The ones that do have GST fees add on like $150 and tell you.
I paid $890 for my 1080 FTW two months ago, where they cost $1249 locally.
Trust me, perfectly safe and no added fees.