Volumes 4 (28, 29, 31, and 33) are unopened, still in their shrink wrap. There is some yellowing and discoloration due to aging, but there are no issues with reading. Please understand that these are used items stored at home. Please judge the condition from the images. I do not smoke, and I do not have any pets. Shipping will be via Yu-Yu Mercari delivery, wrapped in OPP film. No price reductions or individual sales, please.