I have bought two Desktops from the Dell Outlet, and had good luck with both of them. The first one has been with me for about three years, and the motherboard went south on it a couple of weeks ago, I can't complain, I got a hell of a deal on it. Over three years ago I paid $269 and it came with an Intel Dual Core CPU, 250GB HDD and three GB of Ram. Since I bought it it was flawless right up until the HDD controller on the mainboard died.
I may well buy its replacement through the Dell Outlet. Be careful though, the prices vary widely. I took my time and checked several times a day until I saw exactly what I wanted at a price I liked. I probably saw a hundred similar machines at a higher price, then all of a sudden they put about twenty of them just like the one I ordered on over an hour or so. If you see what you like, and the price is right don't hesitate or it will be gone.