Here is a complete set of all 8 volumes of the bunkoban (paperback) edition of "Takehiko Inoue's Ping Pong Club!" I read them once and then stored them. There are some creases on the covers. I bought them as an adult and read them at home, so I think the insides are clean, but I haven't checked the details of the contents, so please only purchase if you're okay with them being readable.