Frame looks like it's from the early 1990s ... I think that's when the cantilevered rear dropouts were phased out....so 15 years old or so. Parts quite likely have been swapped & replaced over the years, so they are probably newer.
Looks like it might have a carbon replacement fork, which is a plus. It should be a fine bike for the right price if it fits.
You can look through old catalogs:
http://www.vintagecannondale.com/catalog.html
Classic & Vintage forum maybe ?