If they gave it to him for free it would still not be a money maker. The cost of having the crack repaired by someone good who could TIG weld it. Then the metal needing to be reworked, and finally casehardened to return the finish. The cost could easily hit $500-$700, and then it would be a refinished gun, not original.Offer them pennies to keep the gun that would be useless.
Find a talented welder and fix the crack. Then machine and smith it back to a shooter.