These listings have been popping up on eBay.  This is a US firm, but the symbols/logos are similar.

https://www.ebay.com/itm/USED-Bitmain-Antminer-S7-Bitcoin-ASIC-Miner-4-73TH-s-FreePSU-Perfect-Working/391932509858?hash=item5b40ff7ea2:g:4KcAAOSwHNxaMbmN