Hmmm ... sounds like a handful! I'll take it off your hands for a couple of quid.
I'm not sure that a C900 is any more expensive to repair (or buy replacement parts for) than any other car over 10 years old. The usual stuff - brakes, suspension, etc are all off the shelf parts and the more long term replacement items such as clutches are also off the shelf. Usual tune-up items are available from any local motorfactor and DIY items.
Perhaps your usual garage is no good, or maybe you're not as good a DIY mechanic as you think. Either way, go to a decent SAAB indy and they'll fix it right up as new ... or we could ignore you as a troller (and a bad one at that), but we SAAB owners are nice folks on the whole.