From the pic posted it looked like the issues were mainly internal and not really noticeable. I would personally take a slight discount all day long for the same functional product, mowing that it had issues, to get it. I buy used cases all the time. As long as it's known I don't think you have issues selling b-stock cases. I bet you could easily sell all 50 day one.discussing it internally.
the case is already severely discounted, a $10 discount will prob be the most we can do, not sure how it will be received by customers.