Currently 'out of stock', so therefore a backorder/preorder and will ship when stock becomes available.
Not sure how long this is going to last, as from past GTX1080 listings, even the 'Temporarily out of stock. Order now and we'll deliver when available' page will disappear after a few hours as Amazon is hammered with pre-orders.
Err what? The ones being sold there right now (following the OP's link) aren't being sold by Amazon themselves, most of the other companies that use the Amazon marketplace don't ship overseas, or if they do their prices are ridiculous.
Wait till it's back in stock with Amazon themselves, it'll ship overseas.