This really is a very straightforward and direct question, so please respond similarly. Off beat and and round about ("depends on...") responses are not appreciated.
Now, I recently acquired a 1924 Ernemann Er-nox plate camera (Ermanox - Camera-wiki.org - The free camera encyclopedia) that I might on sell. The question I like to put forward is this, "With these types of vintage cameras, it is worthwhile and profitable to get things like the shutter mechanism/curtains repaired or the lenses cleaned? Would such actions appreciably enhance the value (relative to revamping costs) of the camera or not? or is it more of a sink hole like some cars and boats?