Nice bike. Cleaned up it is certainly worth $300-$400 to someone. If you successfully find someone who is really interested in restoring it (sorry, but I go
for a 21 inch frame) you probably are looking at $200. Having an all 531 frame with butted main tubes is a big asset. The Campy components are not
top of the line - they make it a bit more desirable. Earlier examples bring more money I believe.

Mind you I am fairly cheap and I miss the mark a lot.
There is an effort to catalogue Competition images at this link:
http://www.bikeforums.net/showthread...etition-photos