Hi I have one of each of these. They are the parts listings with exploded diagrams and part numbers. They are about two inches thick.
The S1 one is a bit tatty, so perhaps £80 is fair. It has a red cover.
The S2 one is in quite decent condition, bearing in mind the age of it, and perhaps £100 is fair for that.
I am happy to post.
Jai Sharma
jaisharmalimited@hotmail.com