I have confirmed that all the buttons and other controls are working. I don't think there's much yellowing on the screen, but this is just my subjective opinion, so please check the images and make your own judgment. I think you can also judge any other minor scratches or blemishes from the images. It looks clean at a glance. ⚠ This is an item for the main unit only. Please note that the software, memory stick, charger, and battery used for the operation check are not included for safety reasons. This is a used game console that has only been briefly inspected by an amateur and is an old model. To prevent any problems, please only purchase if you understand and accept this.