Hi John .
Few ways to go about this and depends on how much free space you have .
One is to sell all parts on ebay from engine down to the doors , carpet ,door mirrors.
you can get a lot of money back doing it this way .for example just the instrument cluster
you can get from 50 to 80 quid.
The bonnet $200 - $500 .etc
Check out ebay and see what people are selling from there saabs.
Next would be to sell as is ..
There is no bypass but is common for this to happen as the twice is under the seat and is known to fail due to water ingress.
you could call out a good locksmith and see if they can check and repair /reprogram the system for you .
Here is a link of where you can locate a locksmith that will come out to you .
Please click here for locksmith.
Still need additional information then please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.
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Kind regards Greg.