Thanks for the tip Hans and Frozen North!
Bestbuy is actually saying on their "shipping policy" page: We will cancel orders to known mail forwarding companies. But they probably don't know all of them, and they'd definitely have to refund, so I guess there'd be no harm trying.
I want this NOW though and if they launch mid October, say - then I hope it would be available on eBay immediately. I haven't bought a lot there so I don't know how it normally works.
But really - it seems like I should wait until October.