I see this is an old thread, but I wanted to ask about polybags and this is the best response I've found in the forum search so far. I have several dozen copies of some modern age comics that came polybagged like these Morbius the living vampire #1s. They are all fresh from cases, but they all have creases front, and back from the rear seam on the polybags. Would this be considered a manufacturing defect/error? Assuming that this is the only defect present, how much would that affect the grade? What would be the highest possible grade with such a defect? Tia