They are fantastic cars. But, there are some things to be on the look-out for:
The front CAT is adjacent to the oil pump pick-up, so they can coke the pick-up if they have been in commute traffic (stop & go) with a lot of idle time ... The fix is to drop the pan and clean all. Not that hard.
The Traction Control Computer can be fritzy. If it goes bad you will see the speedo go to zero and the dash will flash all the warning lights. They can be rebuilt by a shop in Boston. Once done, they are good for another 20 years.
In-tank fuel pumps can go at around 100,000 miles. Replace as a maintenance item.
You can get CEL due to misfire from the Direct Ignition Control (DIC). About $250~$400 to replace. I'd just drive it until it can't be cleared to pass SMOG tests, then replace. The misfire is seldom and not a big issue. The DIC uses the ionization potential across the plug gap to predict detonation/ping and will adjust timing accordingly, so they run happily on regular gas, but run harder and faster on premium ... Always use the OEM listed plugs. Sticking Champions in there will cause all sorts of issues ...
Join a Saab forum like Saab Central and you can get all the advise you need
The chassis is still in production in China as an electric vehicle now. The previous workers at Trollhaten are still making spare parts and components