Go on then I'll stick my oar in.
When buying a boat of that vintage there are only really 2 things to consider-
a, condition of hull/transom
b, condition of tubes.
These are the 2 money pits in older boats, everything else is quantifiable. You can look around & view dozens of trailers, engines etc & wait until the right ones come along that suit your needs & budget. Once you've bought the boat however, you're stuck with it. I would want to be very sure I wasn't buying a lemon & given your level of experience (no disrespect, just being honest) I would either leave it alone, or get an experienced eye on the boat, in the flesh, before I parted with any cash. If the fundamentals are right, then the rest will follow. Given time & patience, you will finish up with a nice first outfit.
Be prepared to put your hand in your pocket, boating isn't cheap.
If that boat is in good condition & solid, then it's worth the asking price (or less if you can get it) imho.
If it's soggy, walk away, there'll be others come along.
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5