Does anyone know how much a professional charges for this sort of work? I wouldn't mind paying even 50 cents per image if the results were very good.

Otherwise, for anything you also have negatives of, scanning those in batches would be a better bet. I doubt there are negs in Rob's case.

I've got maybe 1000+ of my own printed photographs that I'd love to scan someday. And probably another 1-2K that my parents have.