I found this Craigslist ad for a C23 today. The seller did not mention it was a Compac so he is either a poor ad composer or perhaps not familiar with what he is selling. Anyway if you are interested in what appears to be a half way decent boat with a nicely adapted trailer here is the link. Please let me know if this is a dead end and I will delete.
http://southjersey.craigslist.org/boa/4450097084.html
Title of ad is below in case link fails and you want to search. It is in southern NJ close to 95.
23' Sail Boat with Trailer - $4000