2002 SAAB 9-5 Turbo on SAAB 9-5

The turbo was replaced on my 2002 Saab 9-5 in February 2008. It went again in April 2009. GM would not cover the repair because the 12 month warranty had expired. Estimate for repair is about $3000. Does anyone have suggestions for a less expensive way to repair - used parts, etc?

I can't afford $3k - and don't know that it's worth putting that much money in a car with 138k miles, so the car is just sitting in the driveway.

Any suggestions are appreciated. Thank you.