I opened the box to ensure it was just the packaging that was discolored and not the unit. The unit is in perfect condition, no discoloring, unused. Thanks for looking. My wife and I strive to bring you only the best items. We thoroughly go over each item. We honestly and openly point out any flaws if we find one. If you have any questions along the way, please don’t hesitate to drop us a line. We are always happy to help. We ship daily and are happy to bulk sell and combine shipping on multiple purchases. Thanks again!