Are you sure it is dead. I took my Viking to the sewing machine store at Joann Fabric because it was giving me issues- they said it was too old, and they couldn't get parts for it anymore, but would give me $100 as a trade in for a new machine.
Told them I would think about it, looked in the yellow pages for a local sewing repair shop. They tuned it up for $70 and it works great.