Be sure fuel tanks have been replaced. If teak decks are still down they will leak, windows will leak. Is there an engine log and how many hours. Regardless have survey done on the vessel. It is well worth the money. 25k sound on the high side unless it has very low hours and everything replaced. I have a 1983 DC that had 580 hours , new fuel tanks, new plumbing, new AC, new windows and I paid 19k