" the majority of this is likely to be generalizing as well as speculation" Exactly!
Yes I make an assumption that the 2018 motors were new when installed and assume that the owner and the motor installer aren't out n out douches.
not nearly as broad an assumption as
"The core is likely 100% shot. I can't believe that an installer and owner would install new engines on a suspect hull. WTF were they thinking except, "hurry up put this together and get it sold". "
I do realize though that the info of the exact age of the "newer" motors was posted after that statement.
It is not the seller's obligation to point out all of the known and possible flaws of a 25yo boat. So long as he's not hiding them or disguising them.
Nobody is going to say "I'm selling because I don't want to get stuck --------a. replacing the transom b. replacing motors c. replacing fuel tanks d. replacing canvas and cushions....."
Everyone who sells a boat is selling their own perceived problems...
Everyone who buys a boat is buying problems...
The OP saw a problem and asked for opinions. Some opinions are RUN!!! and How dare they sell someone that boat!
I just think thats too harsh based on a picture. And it doesn't take into account the age of the boat and the reasonable expectation that old boats eventually need work.