I'd venture to say that it's quite rare, IME, to see an C-96 in that kind of original condition; at least in my part of the country.
Part of that may be due to the relatively large number of surplused models, many altered and/or refinished, that were imported from China several years ago. These comprise the vast majority of what I've personally seen offered for sale at shows and the occasional shop.
IMO, with "value" being an entirely subjective term and always relative to a particular individual, the only meaningful answer must be "Whatever you can get someone to pay for it on any given day. No more, no less."
Obviously, what an avid collector of the genre might be willing to part with in order to obtain it is one thing and what a person of my own modest means and limited interest would is quite another.
All I can tell you is that I bought the only C-96-type pistol I've ever owned, an NRA VG+ condition Shansei Arsenal .45 ACP, several years ago at auction for $950, plus taxes and transfer fees.
I shot it until my curiousity was satisfied and relegated it to the safe.
I sold it last year for $2400, mostly because someone else wanted it enough to offer me the cash.