Top of the case has discoloration. We sincerely apologize, but this product is non-returnable. We would appreciate your understanding. Instant purchase is available. No mold was observed visually. Initial operation has been confirmed (operation confirmed for over 10 minutes at the beginning), but we do not guarantee operation under all usage conditions. Please purchase at your own risk. Please understand the nature of used goods before purchasing. We inspect with care, but there may be oversights, and there is a possibility that the condition of the product may not be fully confirmed. Also, we will check the condition of the product before sale, and we may provide guidance on non-sale or price changes. Please understand. Please refrain from purchasing if you are overly concerned about details. Please check the condition in the images, and if you have any concerns, please ask questions in the comments section. We do not respond to price reduction requests from customers. Comments are not necessary when purchasing. No need to check stock - items listed are for sale. Packaging is simple, and we reuse packaging materials for the sake of the environment. I don't really believe it's for the sake of the environment. Starting price 4000 yen, now 3000 yen.