This board was very expensive until recently.
Dominus Extreme ($800): ASUS ROG DOMINUS EXTREME Intel C621 3647 LGA EEB M.2 Desktop Motherboard NOB | eBay
3175x prices on eBay are ~$850 from china, over $1000 from the USA.
Water cooling parts are also being discounted:
VRM water block: EKWB EK-VRM ASUS ROG Dominus Extreme Motherboard Waterblock
CPU water block: Phanteks Glacier Gigabyte C621 AORUS Xtreme VRM and CPU Water Block Kit, D-RGB
Dominus Extreme ($800): ASUS ROG DOMINUS EXTREME Intel C621 3647 LGA EEB M.2 Desktop Motherboard NOB | eBay
3175x prices on eBay are ~$850 from china, over $1000 from the USA.
Water cooling parts are also being discounted:
VRM water block: EKWB EK-VRM ASUS ROG Dominus Extreme Motherboard Waterblock
CPU water block: Phanteks Glacier Gigabyte C621 AORUS Xtreme VRM and CPU Water Block Kit, D-RGB