This deal has ended.
Through today (2/12), Dell.com has their Inspiron 530s Desktop for just $499 after a $180 instant discount. The machine comes with a 17" widescreen monitor (upgrade to 19" for $50), 1.8GHz Intel dual-core processor, 1GB memory (upgrade to 2GB for $100), 250GB SATA hard drive, 16x DVD / CD burner, and Windows Vista Home Basic. To upgrade, just scan across the components at the center of the landing page. Shipping is free and sales tax is charged to most states.