Why are Nonsuch's so much?

First off I like them esthetically, but I don't think they are for me. I keep seeing 30-36 footers listed for around $60,000 to $80,000 while other boats in that same size and quality have dropped way down. While many of these look to be well maintained, many don't look like they have had much in the way of updates. That makes sense given there KISS kind of style. Just an example:

1985 Nonsuch 30 with Ultra Layout | eBay

Is this person just dreaming or do they really sell at that price? Heck that one has no new electronics, original worn upholstery, granted it does look good on the outside.

They seem to be well made boats, but not that much better than other quality brands. I understand they have a unique rig and layout, but that has as many downsides as it does up sides. Heck it they really were the rig/layout to beat all there would be other companies making them. Why are they seeming to get about twice the money other equally well built boats? Heck they are listed at twice the price of many CS yachts. I just don't get it. Heck most of them have the propane water heaters that are not even installed in accordance with ABYC.

And I am not griping because they are out of my price range (though they are), just they don't seem to really be able to justify there price. It is not like they are a Hinkley or some hand made exotic boat.