Hi Black Lightening. I can confirm that it is a 3.0 Series with all original parts.Could be a 3.0 Series or CAAD2 frame. Here are some recent CAAD2 sales on eBay. If you have the original fork, it will add a fair amount to the value.
https://www.ebay.com/sch/Bicycle-Fr...&LH_Complete=1&_fosrp=1&_nkw=Cannondale+CAAD2