I built a NAS Killer 4.1 with the following components:
Motherboard, power supply, CPU, and RAM from this Chenbro: Chenbro NR12000 1U 1x 8m QUAD CORE E3-1230v2 3.3GHz 16GB RAM NO HDD | eBay
CPU cooler: https://www.amazon.com/gp/product/B00O4UIZ86
Extra case fan: https://www.amazon.com/gp/product/B0824LD35S
Sata cables: https://www.amazon.com/gp/product/B07DRF1XDC
No hard drives are included. USA power cord included. There’s no BIOS password. The BMC password has been set to the default.
Asking $200 shipped to USA. Please PM me if international buyers are interested and we’ll figure out what extra shipping will cost for you. Local pickup in the San Jose, CA area is also an option for a reasonable discount.