I just picked up a 2006 9-3 Aero Vert with 150K miles. Car was horribly maintained but I got it for 1500, +tires,+ Brakes,+ odds and ends (brake flush, filters, plugs, roof sealing) Other than that I love the car. It is smooooth and quick. I get 27MPG at 80 on the highway, 20 around town, depends on what your idea of thirsty is.
Haven't had to work on much but will be doing plugs this weekend, looks like only the rear plugs could be a hassle. Car has really comfortable seats, I travel 250 mile at at time drives 2X a week.
Issues are the weird Saab radio (03-06) (if you want to add a new headunit rear view etc.
You don't really need AWD, Saabs are like a snow plow in snow with good all seasons (better with Snows)
ANyway check thme out, all good cars (so far to me) BTW I have had 9 Saabs this is my first NG car