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Dell Business has the Vostro 220s Slim Tower with Dell 21.5" Widescreen LCD Monitor for $363 + $35 shipping = $398 shipped.

Description:
My System Details
Genuine Windows® 7 Home Premium 32 bit
Intel® Pentium® Dual-Core E5300 w/VT (2.60GHz, 2MB L2, 800FSB)
No Pre-installed Productivity Software
Norton Internet Security™ 2009 30 Day Trial
1 Year Basic Limited Warranty and 1 Year NBD On-Site Service - Important Information
Dell 21.5 inch Widescreen E2210H Analog Flat Panel Display
2GB Dual Channel DDR2 SDRAM 800MHz - 2DIMMs
Single Drive: 16X DVD-ROM Drive
160GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™
Integrated Video, Intel® GMA X4500HD