a good friend of mine has 2 dell poweredges sitting in his basement on a full rack. 4 Xeon 1GHZ + 32GB of ram in one and a dual Fiber setup on the larger server, then his Domain Controller is a dual Xeon 2GHZ + 16GB of ram + single fiber. with a dell powerconnect 48 port 10/100/1000 + 2 fiber uplinks.
did some cleaning at our old highschool, paid 200USD and took em home, lucky bitch.
needless to say lan parties at his house are amazing.