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Dell has the Dell Vostro 200 Mini Tower Pentium Dual Core E2140 1.6Ghz 1GB/80GB + 19" LCD for $399 with Free Shipping.
Regular price was $619.

Description
* Intel® Pentium® Dual-Core Processor E2140 (1.60GHz, 1MB L2 Cache
* Genuine Windows® XP Home Edition
* Dell 19 inch Widescreen E198WFP Analog Flat Panel Monitor
* 1GB Dual Channel DDR2 SDRAM 667MHz - 2DIMMs
* 80GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™
* Single Drive: 16X DVD-ROM Drive
* Intel® Graphics Media Accelerator 3100
* No Floppy Drive
* No Modem Option
* Integrated 7.1 Channel Audio
Final Price for this deal: $399