If and when you decide to break up the set, keep the body, the lenses, the film backs, the winder, the WL finder and one prism together. Add the books and you'll still be offering a beautiful "beginners set" for anyone who wants to get started with Medium Format.
Maybe sell the 150 mm or 250 mm separately as well.
I have a Bronica SQ-B (the same except for some electronics missing) myself and I can tell you it's a beautiful camera to work with and the glass is excellent indeed.
If you brake up the set, I'm interested in the MF Finder S (metered) and one of the Prism Finders (would have to check wich one works best with the SQ-B).
I hope you'll find a buyer soon for this very, very modest asking price.