This Desktop PC

ComputerGeeks.com has the In-Dash DVD Player with 3.5″ Motorized TFT LCD for $170 + shipping. Shipping is about $8.
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Walmart.com has the Acer Aspire T180 Desktop PC W/ AMD Athlon 64 3800+ 2.4GHz, 1GB DDR2, 160GB, DVD+/-RW/+/-R/CD-RW, Vista Home Premium, 17” LCD, 7-in-1 Digital Media Reader for $498.00 + $9.97 shipping = $507.97 shipped.
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Dell Home has Inspiron 530 desktop computer for $349. Choose 24 inch UltraSharp 2407WFP Widescreen Digital Flat Panel , and use $350 Off Inspiron Desktop Purchases $999+ coupon code PQ$FTHDKG4$2M4 to get it for $999 - $350 = $649.
Intel Celeron Processor 420 1.60GHz, 512 MB, 160 GB24 inch UltraSharp 2407WFP Widescreen LCD, 48X CDRW/DVD1Yr In-Home Service, Windows Vista Home Basic

HP Home has the HP Pavilion D4990y Desktop, Core 2 Duo 2.13GHz, 1GB DDR2, 320GB, LightScribe DVD+/-RW/+/-R/CD-RW, Vista Home Premium, 256MB NVidia Graphics Card, 15-Month Norton Internet Security $899.99 Shipped
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Dell Business has the Dimension E521 Desktop for a total of $469 with free shipping. Comes with Microsoft XP Home. Includes VX1935wm Flat Panel 19″ LCD Monitor.
AMD Athlon 64 X2 4000+, 2GB DDR2 Memory, 19 inch VX1935wm LCD Monitor
80GB SATA Hard Drive, 48x CDRW/DVD Drive, 1-Year Warranty, Windows XP Home

Newegg.com has the Sony VAIO LS30E 19” WSXGA+ Intel Pentium Dual-Core 1.73GHz,2GB DDR2,250GB, 8x DL DVD+/-RW/+/-R/CD-RW, Windows Vista Home Premium,802.11b/g for $1659.99 + $18.82 shipping = $1678.81 shipped.
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Dell Small Business has the Dell Dimension E520 Desktop, Pentium Dual Core 3.0GHz, 1GB DDR2, 80GB, 16X DVD-ROM, Vista Home Basic $329.00 Shipped
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Dell Home has the new Inspiron 530 Desktop at a base price of $799 (before discounts). Configure with 22″ LCD Upgrade, 320GB Upgrade, GeForce 8300GS 128MB Upgrade to reach $999 - $350 code PQ$FTHDKG4$2M4 (Expires 8/2) = $649 with free shipping.

Dell Small Business has their Dimension 9200 with Intel Core 2 Q6600 Quad-Core Processor for $649. Shipping is free. Select the Core 2 Quad Q6600 Processor and remove the monitor (select “I will pick 27″ LCD”).
Intel Core 2 Q6600 Quad-Core (8MB L2 cache,2.4GHz,1066FSB) Genuine Windows Vista Home Basic 2GB Dual Channel DDR2 SDRAM at 667MHz- 2DIMMs 80GB Serial ATA Hard Drive (7200RPM) w/ DataBurst Cache Single Drive 16X CD/DVD Burner (DVD+/-RW) w/ double layer 128MB nVidia GeForce 8300 GS Integrated 7.1 Channel Audio Dell USB Keyboard and 2-button USB mouse
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Dell Small Business has the Dell Dimension E521 Desktop, AMD Athlon 64 X2 Dual-Core 4000+, 2GB DDR2, 80GB, CD-RW/DVD-ROM Combo, XP Home, 19” Widescreen LCD Monitor $469.00 Shipped
Product link.