This gear is overpriced, and for those who either have not tried the 17 series or simply had good luck with them, you should know that bitmain gears right after the 15 series became of terrible quality, large farms are reporting 30% failure rate on the 17 series, one member
explained in great details what was wrong with those gears, there is no guarantee that the 19 series will be any different, I think we all know by now that bitmain doesn't give a shit about any one of us, if your gear breaks in a few weeks, they will ask you to ship it at your own cost and it will take a long time until they fix it, that will increase the cost of the miner and waste a ton of your time.
If you insist on buying these gears, you should at least wait for a month or two until you see how they did with other people, but if you want your $2000 to be a laboratory rat for bitmain, be my guest, and quote me when your gear fails or loses a board a month after you have received it.