Thanks Brandon, for recommending the Dell outlet. I had to have a replacement cpu quickly, and got one from them and had it here in three days.
Got a Dimention E520 Pentium duo core processor (930, I think) with 2Gb DDR2 memory, a 250GB harddrive, Radion X1300 pro 256MB video card, etc. I think it was about $730. It's enough for what I need, and not a bad price, I thought. But I was in a bit of a hurry.
I was going to order from Dell store, but you can't get just the cpu alone. I figured I could upgrade the LCD monitor later, the one I have is fine. I would much rather upgrade the memory than have a nice new monitor and there isn't the option to do that.