I have an early 94 SE Turbo. They are not bad cars, but try and buy the newest you can find. I think in 96 saab made the suspension and brakes better.
Transmissions are a bit weak (always a saab problem) and the GM influence is noticable in and around the car.
The biggest problem I have had with mine has been that any kind of work under the engine seems to require dropping or at least loosening the HUGE aluminum subframe so you can get at stuff.This not only holds the engine and trans in place, but mounts the suspension control arms, so it is a beefy and large beast. Thankfully it is lighter than it looks.
Problem areas are:
Weak transmissions.
Headliners can and will fall down
Hoses seem to burst right around 100K (not really a problem, but keep an eye on the maintance)
Airconditioning is weak and probably does not work.
Bad Pixels in the SID, (Saab information display) automatic heater controls, and dash (thankfully not in mine)
That huge hatch seems to invite large bulky loads that tear up the interior.
As Boston seems to the the home of most saabs outside of Sweden, most will have seen some pretty harsh winters at one point. Watch for rust on the early cars.
On the plus side.. the T5 engine management system on these cars is not prone to sludging issues like the later T7