Dell Vostro 220 Slim PC Core 2 Duo 2.66GHz & 24″ LCD Monitor for $549.00 shipped. This is a very slim PC that takes up relatively little space. The specs chosen for this price point are Intel Core 2 Duo 2.66GHz, 24″ S2409WFP LCD monitor (which supports both VGA and DVI), Windows Vista Business Bonus, and minimize everything else. Note that you get free shipping once the configuration reaches $499. This is a good deal as you get a slim PC with Intel Core 2 Duo 2.66GHz CPU along with a 24″ LCD monitor. Here is a screenshot with configuration details. You may also be interested in this deal.
Originally posted earlier, the deal has been revised.