Presumably, pianos made by some manufacturers of a certain age are more viable than others. What are the best makes of older pianos to go for?
One of the big groups of second hand pianos that do very well are the pre-war German pianos. Berlin and Leipzig were producing extremely high quality pianos in the twenty or thirty years before WWII. Steinway, Bluthner, Bechstein, Feurich and Ibach were among the key players to come out of Germany at this time.
