Oh, and a couple of more things:
1) More than likely you can wright the boat yourself. It has a sealed mast and comes up easily. And there are no boards or any other protrusions to cut you up when the boat comes down on you.
2) Don't worry about specialized parts. Add the boat to your insurance policy for mast and hull damage. The only thing that maybe you would have to buy original are the rudder castings, and blades. Most other stuff is made by RWO and other companies, and can usually just be replaced with harken, shaefer, etc.
3) I sold my boat because I weigh 230 so the boat was a bit loaded when I had a crew on board. I made the mistake of going to a Dart 20 thinking that would be the ticket. But quickly ditched that for a Tornado. Tornado and Dart 18 are both designed by same person.