This seems like a pretty good deal if you have spare m.2 expansion slots on your motherboard and want to use u.2 drives with a cable
Lot of Qty:5 Gigabyte M.2 to U.2-Mini-SAS Add-In - NEW | eBay
Lot of Qty:5 Gigabyte M.2 to U.2-Mini-SAS Add-In - NEW | eBay