Lenovo ThinkStation S30 Tower Intel Xeon E5-1620 3.60ghz 4gb RAM No HDD NVS 510 for sale online | eBay
HP Z820 Workstation 1 x Intel Xeon E5 2697 v2 Dodeca core 12 Core 2.70 GHz 16 GB DDR3 SDRAM 256 GB SSD Windows 7 Professional 64 bit upgradable to Windows 8 Pro Convertible Mini tower - Office Depot