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, Asrock X58, Geforce 210 0db, 120Hz 27" 2ms Asus, Cherry MX Blacks, Samsung 128Gb 840 Pro, Vertex2 100Gb, 8x1TB Samsung F3 on a Lian Li HDD Power Controller.
Rig2: Xeon W3690 @ 4.3GHz HT on 1.35v, QPI Link 4.0GHz, Uncore 3.8GHz, 1986MHz cl18.104.22.168 tRFC 60 2T, HK 3.0, Swiftech MCR320 Drive Rev3, EVGA 760 Classified, GTX 670, 144Hz 24" 1ms Asus, Cherry MX Reds, Samsung 840 Evo 120Gb, Vertex LE 100Gb, Creative Zx