I got my multiboxing PC (pc portion only) on ebay from a business builder for about 550. 160GB hard drive at 7200rpm, 2.4ghz quad core processor overclocked to 3.2, 4gb ram, 1gb 9500GT graphics card, I run 5 boxes, several internet windows and other applicaitons with no problems at all. I can link you the item link if you'd like.