I found a similar priced computer here:
http://cgi.ebay.com/ws/eBayISAPI.dll...category=14294
Its off by only a few items but also its selling for 300.00 and has 6 days left. The "buy it now price is $425.00". I want to say depending on its condition it may be on the high end of the curve. Dell generally makes good computers and should be a good buy.
As long as you are consdering buying from private people Try Ebay
Since you could buy new for about $100.00 more:
http://search-desc.ebay.com/search/s...81287&skip=150
Thsi should give you a good idea of the going prices of new computers and a fair smattering of used computers.
Vern