Caveat Emptor
I don't think BTC or Mining hardware is any less or more suspect than other businesses. Although there are certainly are plenty of examples of price gouging in BTC Hardware. Bitmain isn't going make more units a break even or small losses so it does make sense they raise the price and expect "pre-orders" given the long slide of price drops since the S1's was released.
I look it at this way. Why is anyone buying miners given the current BTC price knowing full well there is no return likely on these units even if you have lower power costs? It is like you want them to maintain prices so you can make a return on your investment. I see all the complaints as valid in this case with the rapid rise once there were no competitors providing viable alternatives. But the simple solution. Do no buy them.
Further to this there is no way an individual buying a few miners is going to compete with the farms not unless there is a rethink about pooling resources and the very nature of a "home" unit. At this point there is no reasonable argument for buying small miners with limited power availability. It was a bad investment at 369$ or even lower.
I expect Bitmain to charge in accordance to their costs and the market. I know damned fine my chances of making anything from BTC are dismal, it's primarily an interesting hobby for me. All I'm looking for is equitable treatment on the part of vendors -- I make out the way I make out (my power cost is 14.5cts per KWH). I don't begrudge them their profits and if they make a calculation that concludes $419 is the correct price, I may wince, but I presume them to be correct. If it turns out they were wrong and they readjust downward, then I expect them to make good on their overcharge. This isn't barter, not a question of one-of, not a rare antique! This is a product, day-in/day-out. The pricing fault was there's, not mine!