Dell Home has the Dell Inspiron 530s Intel Celeron 450 Desktop Computer for $279.00. This is a very slim desktop that takes up relatively small amount of space. General specs are Intel 450 2.2GHz, 2GB RAM, 320GB HDD, DVD burner, and Vista Home Basic. Shipping is about $35.
You may also be interested in another deal we have, which comes with a 18.5″ LCD monitor.