Leave the guy alone. So what he bought a 10K boat without a survey...
What is the damage to the bulkheads anyway? Is it from water intrusion? Check your decks and make sure they don't seem soft or spongy. I'm not sure if the Ericson/Alberg has a cored deck or not but if the decks are in good shape and the rest of the mechanicals checked out then you got a pretty sweet deal on that thing.