Waiting until launch day
http://www.nintendoworldreport.com/news/43653/amazon-announces-plans-for-nes-classic-mini-sales
The NES Classic will only be up for launch day on Amazon, and the procedure will be familiar for rarer Nintendo products.
In an email sent to those who signed up for notifications, the company announced that orders will be taken for the small console beginning Friday, November 11 at 5pm Eastern / 2pm Pacific. Orders will be limited to 1 per person and 1-click ordering will be disabled.
Other retailers have also confirmed a first come, first serve for the console including GameStop/EB Games and Walmart.
Whelp, stock ran out in less than a minute on Amazon...And from the 2 seconds I saw it available, it looked like they were charging $5 for shipping with no option for Prime shipping...don't think I've ever noticed them do that for an item sold directly from Amazon.