Sailboat cost vs Powerboats
I am not sure that I agree that the current sailboat market is a Buyers market. In a general sense over a long period of time sailboats seem to sell for pretty much what they cost new (without fit out) and seem to hold their value as long as you maintain them.
For a period of years now I have tracked certain models that I like and that I think of as good indicator models and their asking prices seem to be going up (quite sharply in some cases) and they seem to be selling fairly quickly. That sounds like a sellers market. Counter to that, there seems to be a bigger backlog of Hunters, Catalinas, Bavarias and Beneteau Oceanis and number series boats so there may be a bit of a buyers market with the higher production value oriented builders. Counter to that there actually seems to be a shortage of good, clean, higher quality boats on the market than there had been so I guess it depends on what you are trying to buy.