The Bitmain direct sales on Amazon were about a week ago. If you look back through this thread you will see the announcement. There was a link from the Bitmain site on batch 2 for about two days. They were about $485 delivered in the US.
Great way to sell dollars and buy BTC, even if the b/e will be a bit higher depending on electricity.
Yes, especially if you have an Amazon credit account with free financing for 12 mo

I have one coming from this buy, interesting point of origin is CONIFER, CO, US but the pickup location was Kansas City, MO. Well maybe they did make a bulk shipment to the US for this distribution.