Almost every metropolitan area has some place where they sell loads of refurbished machines. If you want some legacy server grade hardware, just google up your local area.
I found a place that was local to my house a few years back when I needed a ton of inexpensive office pc's. They would always have some old dell hardware...sometimes server grade. http://intechraoutlet.com/ <--that is there site. They have an actual warehouse facility in Carrollton, TX (DFW), with others elsewhere. Maybe you can find something comparable.