Pins have always had production imperfections and sometimes worse. I've been collecting since before the start of Official Disney Pin Trading for the Millennium Celebration and I can look at the pins I purchased during those early years and they have dips, color errors, marks, etc. Some years were worse than others, depending on which factory Disney was using at the time. But during all those years, people weren't looking at them up close or with jewelry loops or any of the enhanced inspection that people use now. I understand when people are spending hundreds or thousands of dollars on low LE pins they want perfect pins. But I end up wondering if collecting actual jewelry might be a better use of their money as those aren't intended to be cheaply made, mass-produced trinkets. Or stick with a supplier like Artland / Pulse Gallery. The fact that these predictable and expected issues weigh on every trading level to the point where traders ask if brand new pins should be thrown away, makes me sad and frustrated.
So no, don't throw the pins away. Disclose, and wait for a trader that doesn't expect perfect pins.