Before you get serious enough about this boat to make an offer, you need to get a professional marine surveyor involved.
A close to 14-yr old boat that has a balsa cored hull needs to be hauled and checked with Hull Moisture Meter. Unless you have some experience with such a tool, best to spend a few hundred and have the thing inspected by someone that has the training and expertise to render a proper opinion.
Particular attention must be paid to (But not exclusive to) any thru-hull fittings such as depth sounder transducers, pump discharge outlets, portholes and thru-bolted cleats up top.
DO NOT take this stuff for granted as fixing water-intrusion problems in a cored older hull is a VERY expensive procedure.
WAY more than an upfront survey, for sure.
If the owner refuses to submit the boat to such an inspection, walk on by, he's got something to hide.