Thank you for viewing. Please be sure to check the profile. ・I am not an expert, so I cannot answer detailed questions. I will offer a small discount if you purchase multiple items. ・I do not mention yellowing or fading due to aging unless it is significant. Please check the photos. If you are concerned, please comment and I will answer. Since these are used items, the main consideration is that they can be read without problems. ・If you have any other questions, please contact me before purchasing.