I just put in the order for the prototype for this board. With all costs, coupons, etc., the total price is $60; for a single, fully-assembled prototype (with four board-only siblings) coming from China, I don't think that price is too bad.

The bad news is that the coronavirus outbreak has caused some delays, as the production facility had to be shut down for a couple of weeks. The lead time was already kind of long (about a month, if memory serves), but I won't be expecting this until around mid-May.

I'm not too worried about that, though, since I still have to get other parts and stuff in order to test this board, and that'll take about that long. So, it all works out!