The question is what are people willing to pay for such a bike. Equipment spec makes little difference to most buyers.
Searching recently closed auctions on eBay for CAAD5, there is a 105 Equipped CAAD5 R800 that sold for under $300. Then there is a 2004 CAAD 5 Frameset only that sold for $370. Craigslist usually fetches even lower prices when compared to eBay.
If maximum return on your dollar is what you desire, you'll have to sell it in parts. Or sell it somewhere like RoadBikeReview classified section.
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98 Colnago Altain
08 Pedalforce RS2
00 Specialized Stumpjumper FSR
06 NYCbikes Single Speed (John Deere Special)