Aircon needs fixing - bet it's not just a re-gas, but it's not likely to be an expensive job unless the compressor requires replacement Other than that it sounds fine. I really like the interior colour, too. It's a bit of an old fart's colour, which is good too - I doubt if it has been thrashed. With any luck, it's not had too many owners, and it is likely to have appealed particularly to middle-class B.O.Fs (like me..). It's standing outside the right sort of house for said B.O.Fs, too.
I reckon it will turn out to be a good 'un. In fact, if I was looking for a replacement for the Saab Aero estate now, I'd bid on it myself. Good luck.