Thought my pair of S5's would ship on 08 Jan. but got notice they shipped yesterday (via BitMain on Amazon).
Pretty sure the stuff on amazon is an unofficial reseller.
No, they were official Bitman sales of B2 & B3 (at a small markup.) with the same stated shipping dates.
Yes, my mistake it was supposed to be 04 Jan. (not 08 Jan.) and they ran the money and gave a shipping number on 31 December. It was though BitMain direct via Amazon. Paid $480 each before it went up to $530 something and now they're only available via aftermarket sellers (no more BitMain direct).