Click here to go the merchant's page.
Dell.com has the Dell Inspiron 530s Intel Dual-Core E2180 2GHz 1GB 250 SATA for $348.
Final Price for this deal: $348 + $29.99 shipping

Description:
Intel® Pentium® dual-core processor E2180 (1MB, 2.00GHz, 800FSB)
Genuine Windows Vista® Home Basic
No Monitor
1GB Dual Channel DDR2 SDRAM at 667MHz- 2DIMMs
250GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™
16X DVD+/-RW Drive
Integrated Intel Graphics Media Accelerator 3100
Integrated 7.1 Channel Audio
Dell USB Keyboard and Dell Optical USB Mouse
No Floppy Drive Included
No Modem Option