Click here to go the merchant's page.
Dell has the Vostro 200 Mini Tower: Core 2 Duo E4500 2.2GHz, 2GB DDR2, 160GB HDD, DVDRW, 19" LCD, for $449 with free shipping.
Final Price for this deal: $449 + Free Shipping

Description:
Intel® Core™2 Duo Proc E4500 (2.20GHz, 2MB L2 Cache, 800FSB)
Genuine Windows® XP Home Edition
No Pre-installed Productivity Software
Dell 19 inch Widescreen E198WFP Analog Flat Panel Monitor
2GB Dual Channel DDR2 SDRAM 667MHz - 2DIMMs
Single Drive: 16X DVD-ROM Drive
160GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™
Intel® Graphics Media Accelerator 3100
No Floppy Drive
No Modem Option
Integrated 7.1 Channel Audio