Refurbished: HP Z2 Mini G4 Workstation (Performance Unit) Intel Xeon E-2124G 3.4Ghz, 16GB DDR4 RAM, 256GB NVMe M.2 SSD, Quadro P600 4GB, USB Type C, Windows 10 Pro (Grade B) - Newegg.com
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HP Z6 G4 Workstation Xeon Bronze 3106 8C 8T RAM 16GB NVMe 256GB HDD 1TB P620 [HPZ6G4-build-001] - $1,799.00 : Professional Multi Monitor Workstations, Graphics Card Experts
HP Z840 Workstation 2x E5-2690 V4 2.60GHz 256GB Ram/ 1TB SSD/ No OS/ M2000 GPU | eBay