I think Jim pushes the limits sometimes--
From Jim's website:
"When it arrived, it was indeed a hoary mess. You couldn't have aimed a photon through the disaster if life depended on it. Dirt, and fungus amongus. "
He had no guarantee that the lens would be of any use. You gotta think that if you do that enough times, you have to find a lens that can't be saved.
Besides, even if it works, Jim's time has to be worth enough that the final cost of the lens is more than it is worth. This, of course, neglects the whole "hobby" part of the task.
Matt