As to longetivity, I concur with FASTER's comments, this is an experienced boat, another 30 years need be no harder on it then the last 30 years, if you give it suitable care.
If I were looking for a PHRF racer, I'd happily buy it, this boat sounds well-equipped and looks to have some character. Probably pretty squirrly under spinnaker
, but stiff upwind is not a bad trade-off.
As you say you want a cruising boat, I suggest thinking twice about this particular boat. I always recommend to buy a boat that has been used the way you intend to use it: whether blue-water, coastal cruising, racing or daysailing...By following this advice you are likely to end up with the gear you want, not with a mess of stuff that's of little value to you. The 10 racing sails on a racer might not be worth to you what the one dacron crosscut 130% roller fuling jib
you want to have, would be worth. If your boat doesn't have such a sail, you'd need to buy it and the gear, then give away 9 of the 10 racing sails for a song...
Just a thought, you might look at a few cruise-equipped Catalina 30s in the low-mid teens and figure out their value to you versus this particular choice, then buy what will work best for your use.