There is a growing niche for these pistols among collectors. I think they are quite desirable in that their provenance continued after WW II. Whether they were carried by rear echelon troops or simply stored for future use, they still were considered serviceable if required. Some made their way to other countries (Israel for instance).
They make good shooters, because as noted, most were fitted with new barrels and any worn parts replaced.
There does seem to be two finishes; one is a tar-like coating that is difficult to remove, and the other is a dipped bluing without buffing. Those are the nicest ones IMO...