What is the source of the BCUs you are trying to sell? You have a pre-order from the group buy and are re-selling?
Because there is no other way to obtain a BCU.
Also do you have your own implementation of Cryptonight Heavy bitstream? Because nobody announced one yet.
I suppose it's xilinx direct, the shipping date is 2019 so this is probably a different batch.
Nocroom seems to be a legit company founded in 2016 for what it's worth. No idea why they would jump on the fpga bandwagon as it's not their primary business