Determine values

[slhubbs]

I’m a new member and looking to purchase a GB 36 or 42 on the east coast. I noticed a large price difference between the late 1970 boats verses the early 1980 boats with similar equipment and engine hours. I’m trying to figure out why
Appreciate input
Thanks
Steve

 

[Comodave]

GB went from wood to glass in 1973. The wood boats are much lower priced.