Looks like someone is putting up a bulk number of these boards on ebay currently showing 400$ or make an offer with 10+ available
SUPERMICRO MBD-X10SDV-4C-TLN2F-O Intel Xeon D-1520 Mini ITX -NO IO SHIELD
SUPERMICRO MBD-X10SDV-4C-TLN2F-O Intel Xeon D-1520 Mini ITX -NO IO SHIELD