Back in the print days, I was taught that prices would go down to increase sales. These days of probably little work for marine operations, they raise the prices to keep their profits coming in.
I also wonder if there's a generational effect (not the one for boomer/buyers). Many marine operartions started when waterfront property was cheap and now the ever-increasing number of people have rediscovered water and the land is no longer cheap. Do the kids of boatyard families want to do all that work when they can sell the place for condos? Or if a new owner does buy it, they have a much bigger nut to cover than the original owner did.