the 31 bertram first came off the line in 1962, this boat was the for runner of all the rest of the deep v boats that followed, ray hunt designed the hull, he also designed the hull of the boston whaler.
a completly re done 31to buy or to do your self will be in the ball park of $100,000 dependinig on how much you get the boat for and what type of power plant your going with, the two popular being yanmar and cummins. a $100,00 is a good round figure plus or minus.