I need a computer. Help!

[unenergizer]

Well my computer decided to quit working on me the other day. I was giving a demonstration on how to put a computer together for a high school class. I put it back together and now, it doesn't work. This is just great.

Now, believe it or not, I have been developing websites and web applications using an old Gateway Performance 450. Have a laugh and look that up on google. It seems like I've been using this machine since the beginning of time.

So, here is where I need help. I am looking for a new or used computer. I have browsed over ebay. Nothing spectacular, at all. Specifically, all I need, is a motherboard, power supply, and a nice processor. I have everything else. It would be great to get all of this for under $200.00 usd.

If any one has suggestions on where I can find parts please post links. I would like hardware suggestions to.