Refurbished: HP Z400 Workstation - Intel Quad-Core 2.66GHz W3520 Xeon Processor, 4GB RAM, 500GB HDD, DVDRW, NVIDIA Quadro FX 580 Professional Graphics, Keyboard & Mouse, Windows 10 Pro 64 bit - Newegg.com
Z400 Workstation 15GB RAM GTX 1660 | Jawa
HP Z400 Windows 10 Pro Workstation Computer PC Tower Intel Xeon Processor 8GB 500GB Dual Video Graphics and WIFI
HP Z400 Workstation Intel Xeon Hex 6 Core Quadro Graphics 16GB RAM CAD Tower PC | eBay
Amazon.com: HP Z400 WORKSTATION : Electronics
HP Z400 Workstation, 1x Xeon L5640 2.26GHz Six Core Processor, 8GB DDR3 Memory, 2x 2TB 7.2K 3.5" SATA Drives, AMD HD 8350 Video Card, Windows 10 Professional Installed, (Used) - Walmart.com