Got this info from someone in the DOE. No OS, configurable. Found this one at http://bensbargains.net/ for anyone looking for a system. No OS, take the 1 year warranty. Should be $366.64 shipped to Hawaii. Might consider if for a workstation too.
http://configure.us.dell.com/dellstore/config.aspx?c=us&cs=04&kc=6W300&l=en&oc=pe600sc Choose Servers >PowerEdge SC >Customize $289 System: Free upgrade to Pentium-4 2.4GHz, 1-Yr Cheap Warranty, Gray Keyboard/Mouse. Your total is then $499 - auto $110 off - 5% off coupon 8D2755970FD4 - $100 rebate [Exp 3/12] = $270 with free shipping. Pentium-4 2.4GHz, 128MB DDR, 40GB 7200RPM Drive, 48x CDROM Integrated 10/100 NIC, Keyboard, Mouse, 1-yr Warranty, No OS