Welcome to the board
Having owned a 1992 Zodiac MK2 Futura Sport, I would not think it viable UNLESS it was stored indoors. So where was it stored for a majority of it's life? Looks like outdoors from the photos.
Zodiac seams are thermo bonded and tend to not fail, but the floors and all accessories are glued on and the glue won't last this long. Regluing the floor and transom is a ton of work probably over 30 hours worth to go a good job. Great boats and a lot of fun. Yamaha outboard are excellent motors and only need so much care.
The price seems high to me, but not overly unreasonable, and hopefully negotiable. If there is something else to do in the city the boat is located in you could always take a look. "Make a day of it".