Tested and confirmed to be working. There are scratches and stains. Please check the photos. Please note that the filter has not been cleaned or replaced. If you have any questions, please be sure to ask before purchasing. We cannot accept returns or cancellations due to questions asked after purchase. We cannot answer questions after purchase. We are a corporate entity. We have a large number of items for sale, and we try to respond as quickly as possible, but in some cases, it may take some time. Thank you for your understanding. If you have any requests for shipping or delivery dates, please check in the comments section beforehand. Please note that we may not be able to accommodate requests for shipping or delivery dates after purchase.