I purchased this here 7 years ago and have kept it in an acrylic case specifically for shikishi (colored paper) and wrapped in bubble wrap since then, except for when I took it out to check it. I received it 12 years before that, so it's been nearly 20 years, but I think it's in pretty good condition. There is no noticeable aging or staining. Please consider this only if you understand that it is being stored by an individual. I am not accepting price negotiations. 7 years ago, when I received it, I was told that the shikishi had a slight warp, but it's at a level that I don't notice at all upon personal inspection. Now that the band has indefinitely suspended activities and is no longer performing, I believe this is quite valuable.