I was seriously shopping for a 22 in winter/spring of 2012 (started in February; winter did not deter me).
While I can't speak to your exact boat/price (I'm not sure which one it is), I can tell you what put me off some boats and put me "on" to others:
1) What can I see in - and find out from - the ad?
By far the biggest factor. How much effort was the seller willing to put in to help me to see what he/she is selling?
It was amazing to me how many ads were just one or two short sentences. Maybe a couple of distant photos. It was as if that person had never bought anything used, and so couldn't anticipate what a buyer would want to know.... I found it mystifying.
2) Would the seller be an "ally" to me?
By this I mean, if I had a question, would the seller clarify for me? Take a photo? Get me the model number of the chartplotter? Maybe hold the boat for a day while I was on my way to look at it (presuming serious buyer, perhaps a deposit, etc.). I found it interesting how many people advertised their boats in an Internet/national venue, but were unprepared to get images/data to someone online (granted, everyone is not 100% computer savvy; my main thing was whether someone was willing to try).
3) Did the seller spend more time trying to convince me how great C-Dory's are and how much they are worth (I already want one; and I have an idea of the value), or answering my questions about that specific boat?
#1 was by far the biggest thing that put me off or on a boat. A good, comprehensive ad, with good photos, tells me nearly all I need to know, and with no further work from "you" (unless or until I contact you because I am really interested in buying your boat).
#2 is really nice when you can get it; not necessary, but nice.
#3 seemed to be inversely proportional to #1
One last note: I prefer it if people disclose flaws (that I'm going to find anyway when I come to see the boat). To me it falls under "I don't necessarily mind problems, but I don't like surprises." I expect flaws, but just like to know what they are (presuming the seller does) so that I can decide if they are ones I'm comfortable taking on. I'm also more likely to believe the good points about the boat if the bad ones aren't glossed over. ("but that's a five-minute fix," etc.)
Again, I have not seen your ad. But if it's a good, complete ad (like in my #1), with good exposure -- and with a popular boat like a C-Dory -- then if it has not sold in a reasonable amount of time I would tend to think it might do better with a lower price. If it's not an ad like in #1, then improvement in the ad would probably be my next step if it were me.