The single order is prohibitively expensive (USD$93), but three copies gets it down to USD$71 with postage. Additional copies (up to max 6) for $55 + $5 postage, which chips away at price per copy slightly.
There's also a reward level with the unlocked expansion which adds an extra tonne of cards but ups the price to $106 per copy inc postage based on 3 copies.
Anyway, I need this like a(nother) hole in the head, but if anyone is interested let me know before 18 May.
I am tempted as well but live in Adelaide so no help to you.
I have done some sums though. If I go it alone it will cost me about $115 AUD for the base game (with promos).
Milsims will probably sell it for $90 (based on their price for Devastation of Indines, which would have also cost $50 USD for the base game on kickstarter at the time) so that's $97.50 including shipping cost. But if I want the promos and pledge $5 ($25 AUD to cover shipping) I will end up paying over $120 AUD to get the same thing as if I pledge $50 USD for the base game.
So $115 for the base game + promos or wait until it comes out and pay $98 AUD but no promos ....
Tough call, and I do like to eat so prefer not to miss out on food for a week ...