I guess the notion that "If it sounds too good to be true, it probably is" applies here.
When I bought my D80 a couple of months ago, I noticed that a used D80 will
fetch anywhere from $650 up to $750 body only. With lens, it can be $50 or more.
I got lucky with my Craigslist purchase because I paid $850 for it including 3 lenses and 4GB total ram.
Like I always said, Craigslist is your friend especially if you have cash (I paid Paypal by the way).