I have 8 great working bitmain S3 units. I would include three 750w corsair units and one 1000w corsair unit. Also I have a dlink Ethernet switch, and two back up battery supplies. Located in STL would like to sell local but would do shipping but you pay shipping. I won't sell using paypal, I've had too many issues with them and eBay lately with scammers. Any questions just ask!