Viennese action and value of Bosendorfer with it

[Rob Gagnon]

Is a circa 1900 7 foot bosendorfer with viennese action
worth less than the circa 1930 and on models with regular
action?  What do you suppose the value of this should be
given flawless condition, beautiful tone, lovely cabinet
work? There must be less demand for this type of action
as it seems not to handle extremely fast notes.

Also, my books don't talk about this type of action. Is
it more difficult to regulate/repair/replace parts/etc.?
What are the fundamentail differences?

Thanks much - Rob