I have one (actually the wifes car, but I do all the maintenance on it) and its doing pretty good for a car with about 173k miles on it. If you are familiar with 850's, then you already know about some of the cars quirkyness. Interior plastics are biodegradable, electrical systems can be somewhat problematic. If you are looking for a very safe and well built car, this is it. It is built like a tank. Last model years, 97,98 are probably about the best in terms of overall reliability. Engine will last forever if taken care of. You have to stay on top of maintenace (timing belt, etc) and it will do well. Has to have the tightest turning radius of any car I've ever driven. Go back several months in this forum and the 900 forum and you will see many opinions pro and con. I think most of the people that have em, like em with a few exceptions. If you can find one with about 100k miles or less and with service records, then it will probably be a good deal.
--
97 S90 with 171K miles still going strong