Mako's are pretty decent boats.
I would have to look it up but if memory serves they were built in Missouri.
The boat is not "made out of Balsa" but rather reinforced with it. Balsa is used as a honeycombing material because of it's light weight and is used in vertical grain applications typically in a ile pattern then the voids are flowed with resin and finished off with clear resins and matt/cloth. This was one of the strongest types of boat construction back in the day (think '70's and '80's..
The biggest thing with a balsa cored bottom is to look for dark spots and delamination. Balsa is not waterproof and really not intended to be wet.
The Dominator should be a nice piece, basically a really nice Berkeley clone.
If you can get some pictures of it and a hull ID# there are quite a few guys on here that could decipher it for you..
Rule number one with buying a boat, if it makes you happy and you feel comfortable with it, buy it...If it don't feel right, keep looking. You will not be finding a perfect boat. Trust me, I've tried.
Welcome to the site....

GT