What does "worth a harvest" mean?
If you like the chips and think they would be playable somehow/some way, then yes, a buck a chip for casino Paulson chips is good. Assuming they are Paulson of course.
If the question is; can Hero make significant money harvesting for $1 and reselling them? That seems pretty unlikely so long as the chips are live. Maybe there is a small profit potential, maybe not.
Personally, I would harvest whatever amount you think is useful for your own use and not much more -=- DrStrange