This one was too good to pass up. Today, using this link, for $499 you can get the following Dell Vostro 200MT system with no shipping charges:
Recommended upgrades: For $30 more you can double the disk drive to 160GB, and for $50 more you can bump the processor to an Intel® Core™2 Duo Proc E6550 (2.33GHz,4MB L2Cache,1333FSB). Don't forget to add $10 for an optical mouse (I can't believe they left that out), and speakers if you don't have any. Gamers may want to plan on adding a PCI-e graphics card if the integrated graphics are not sufficient. Taxes not included.
I just ordered a couple for my kids and wanted to share the price with you before it expires. I have no affiliation with Dell other than being a customer. Enjoy!