I used to think I could do better building a machine from newegg parts online but lately you would be impressed with what they have to offer for a decent price on dell small business (just makeup a fake business name when you order-I just did this for a cousin of mine 2 weeks ago when they had the deal on spoofee.
This was the most recent deal.
http://slickdeals.net/?permadeal=10238#direct_deal_10238$469 with free shipping
Specs
Intel Core 2 Duo Proc E6550 (2.33GHz,4MB L2Cache,1333FSB)
Genuine Windows XP Home or Vista Home Basic if selected
Dell 19 inch Widescreen E198WFP Analog Flat Panel Monitor
which you can upgrade to the 20" digital flatpanel below for 50 bucks1GB Dual Channel DDR2 SDRAM 800MHz - 2DIMMs
80GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache
48x CD Burner / DVD-ROM Combo Drive
128MB NVIDIA GeForce 8300GS
upgrade belowIntegrated 7.1 Channel Audio
1 Year Limited Hardware Warranty with Next Business Day On-Site Service
Good upgrades to consider:
Dell 20 inch Widescreen E207WFP Digital Flat Panel Display [add $50]
256MB NVIDIA GeForce 8600GT [add $50] or 256MB NVIDIA GeForce 8600GTS, 2DVI [add $80]
All for around 500 bucks or so give or take a 100 depending on your specifications.. but then you have a brand spankin new 20" lcd to mess around with.
Neil