This deal has ended.
Dell has a Dimension E521 Desktop with a 250gb hard drive, 512mb memory, 16x DVD-Rom drive and AMD Athlon 64 3200+ processor that you can get for only $409 if you change the configuration. To reduce the posted price from $539 select "no monitor." Shipping is free. Of note: the 20" LCD monitor (model E207WFP) is only a $260 upgrade.