The ability to save or rescue something from being lost or destroyed.
Salvageability is a good thing because it means something can be saved or rescued.
Examples:
The salvageability of the old ship was in doubt.
The salvageability of the lost treasure was uncertain.
The salvageability of the building after the fire was surprising.
The salvageability of the situation seemed impossible.
The salvageability of the ancient artifacts was a great discovery.
The salvageability of the old car was a miracle.