I don't think that Bitmain want to sell all of their D3 inventory. They want miners always chase their products. Some sources of mine in China states WHALES don't want small fishes in the game and they got majority of the miners in China before selling to the world. It is not hard to pretend their web site is so busy and you don't get the reach out proper site to order product. I think they are playing with customers.

Last week one of my China contact said they sold 150 L3+ for $4200 and if you don't have big money, you are not in the game.