Refurbished: HP Z420 Workstation - Intel Xeon Six Core Second Gen E5-1650v2 3.5GHz - 8GB of RAM - 480GB SSD Hard Drive - DVDRW - Quadro NVS 290 Video Card - Windows 10 Pro - Newegg.com
HP Z420 E5-1650 Six Core 3.2Ghz 16GB 500GB 2TB Quadro 600 No OS
Amazon.com: HP Z420 Workstation E5-1650 V2 Six Core 3.5Ghz 32GB 2TB Dual DVI Win 10 (Renewed) : Electronics
HP Z420 Workstation Xeon E5-1650 v2 3.5ghz 6-Core 32gb 500gb DVD 2xDVI Linux Based – Garland Computers