Just to clarify:

The entire 5000-piece run was sold out. Someone failed to pay for a large order.
Those units (approximately 800, originally) are now available on https://store.mineority.io. AllMine (fpga.land) is no longer processing orders. You can also go to http://squirrelsresearch.com, where you'll be redirected to the mineority.io site. AllMine, Squirrels Research, and Mineority have effectively partnered on this deal.
Some units are also available on https://blackbox.cat, who is also a part of their team in some way.

Anyone else offering BCU-1525s is not an authorized re-seller, and likely a scam - they're popping up on a daily basis.