To save this Contessa or not?

It looks like the required work shouldn’t be an issue as long as you are willing to do it yourself.  Fiberglass does not really go bad with age and any cracks, if indeed they go past the gel coat can easily be remedied…  there are many tutorials on YouTube, etc.  Looks like she will clean up nicely and would be something to be proud of with some elbow grease.
It’s hard to tell from the pictures, but looking at some of the details on the deck, I suspect this is a pre-1984 changeover.  The anchor locker and mid-ship hatch may be a later addition.  You can tell for sure by the last four digits of the Hull ID number (month and date the boat was completed), located on the upper right corner of the rear of the transom.