This deal has ended.
Through 5/21, Dell.com has a model of their Inspiron 530 Desktop Tower on sale for only $299 after a $140 instant discount. It comes standard with an 2.0GHz Intel dual-core processor, 1GB memory, 320GB hard drive, 16x DVD / CD burner, Windows XP Home Premium, and a one-year warranty. Monitor is sold separately (check out recent BradsDeals listings for monitors). Upgrades are available for most components (just scroll across the icons at the middle of the landing page). Shipping is free and sales tax is charged in most states.