F/W makes a good boat, I have owned mine for almost 15 years and its nearly 30 years old now. For a boat that size they ride well, due to the steep deadrise and the hull is stable in rough water. With a boat that age , the first thing I'd do is check for rot and other hull damage, if it checks out then look at the mechanicals. For checking for rot, I would look it over well and look for cracks:
On the outer transom round the transom mount
On the inner transom mount in the engine compartment
On the engine mount stringers which are usually wood
Inside the ski locker, often you can take a bright led flashlight and a mirror and look all round in there, as far up as you can see, for dark spots on any wood you can see. On the deck, first make sure there is nothing sharp around to cut your feet. Then take off your shoes and walk around on the deck, springing up and down, see if it flexes anywhere. Flexing is a sign of rot in plywood cored decks. And keep in mind, even if it has a full fiberglass liner, it is likely cored with plywood. While this is much better than a wood cored deck with carpet glued on it (the absolute WORST construction you can have do NOT buy a boat built like that) you can still have rot if the boat's cover leaked and it was stored in a damp climate. Then grab the seats and see if you can flex them, look at the deck while doing that. If they are loose, or the deck flexes a bit when you do that, there could be rot. Look all around the underside of the hull, along the strakes, etc for stress cracks, this can be evidence of weakness (rot) in the hull stringers.
If it passes all these tests, do a water test and mechanical inspection. I'd rather do mechanical work any day, than fix rot in a wood cored fiberglass boat. I had to do that on my '88 and while it came out good, never again! That was 10 years ago and its still solid now. It had the lousy glued on carpet, I had to replace the deck and some of the stringers, from the helm seats to the engine compartment. When I put in the new deck in, I had the deck gelcoated in non skid gelcoat, and threw all that carpet away. Then sealed every single hole drilled to mount seats. That's how you make a wood cored deck last. Sealed holes, no carpet so it dries out.