I paid $399.00 for this E-Machine complete with a 22" widescreen monitor and if I can find a comparable deal with Windows 7 pre-installed, I'd purchase another one in a heartbeat.
Kinda makes building your own impractical, doesn't it? Persistence will find ready-made computers for significantly less than one can build an equivalent computer and buy the OS for. I used that procedure to get my one copy of Vista. (Well, at least I got a computer out of the deal)