Most of the time I see the sx-1980 listed, it is high priced, but it is a huge service manual. I noticed he had a sa-9900 service manual, I have one, but you don't see them too often. I bought one from him for my pd70. I try to get originals when I buy manuals and all of these are originals. He must have bought them up from a dealer that went out. Probably got em for a few bucks. Just once, I would like to fall into a find.....a great big find!!! There's always tomorrow.