best to look on Craigslist. I found 2 professional viewsonic pf 225 crts for 50$ a piece, then later on I found a Sony fw900 but it had a huge scratch dead center of the screen = declined it. but there are good deals to be had on Craigslist. just be careful dealing with people on there.
Rig1: Xeon X5690 6core 32nm (3.46GHz stock), Asrock X58, Geforce 210 0db, Samsung 128Gb 840 Pro, Vertex2 100Gb, Cherry MX Blacks, 2009 Seasonic X 650w, Aluminum Full tower
Rig2: i7 970 6core 32nm @ 4.5GHz 1.36v (testing): Uncore @ 3GHz 1.30v, EVGA 760 Classified, GTX 670, Samsung Evo 120Gb, Vertex LE 100Gb, Creative Zx, Cherry MX Reds, Sidewinder X5, Enermax Revo 950w, Obsidian 800D