No need to buy anything from these scammers, if they take money 3 months in advance and selling units uncontrolled in numbers, this means they are scammers from now on.
problem is bitmain owns 90% off all the equip made now imho, sha-256 (btc) , scrypt-pow (ltc) and x11 (dash)
NO ONE is going to invest the kind of $$$ to make a whole new mnfg plant etc to keep up with the volume of crap they can shoot out the door ..in any given month....an't gonna happen!
There are other manufacturers that MIGHT put out in their main batches as much as Bitmain puts out in a month (of any asic flavor)
I see them having NO competition...thus will 'run the table' for years imho,
As an example IF/WHEN say LTC was to hit $100 this month....don't you think you'd see 40 LTC on a miner again (ie 4k?) of course you would!
its how they roll.... (bitmain: we do evil well) tm bitmain