Well, what I can say from my research that obviously GST is 15% and then there's the admin fee of around $52 NZD... getting JB HiFi Australia to deliver a 128gb Pixel 3 and a Pixel Stand to my friend in Melbourne added a cost of $1,604 NZD to my credit card bill. So maybe that is all you pay... or maybe you end up paying the extra bit, too.
And as someone else said, if I was heading over there myself I'd definitely consider grabbing one and claiming the GST back! I'm loving it so far - the camera is ridiculous and I'm loving having pure Android. I've made a conscious decision over the last two years to really dive into the Google ecosystem after that announced the first Pixel, and now I basically use everything Google offers so it's great not having random junk on my phone that I'll never use and can't delete.