If there is sentimental value, and the mechanicals are in pretty good shape, then an organ such as that can be a great learning curve and experience to take on. Not many can take on such a diy project, as it requires some bench space (!) and will consume a lot of time, even if experienced. I've restored a somewhat similar Selmer organ.
As indicated, most will buy a vintage valve organ just to part it out, with no interest at all in the history or design of the organ itself.
If you are in to diy valve amps then morphing the amp section is itself a great journey to take, but will require electronics effort unless you can find a forum thread somewhere that can be used as a running start. The amp chassis circuitry can be sketched in to a schematic (there doesn't look to be one on the net) if you have a bit of circuit experience, as valve circuits are pretty similar. The tone gen chassis etc have some parts and hardware worth retaining/salvaging, such as valve bases, pre-folded and punched chassis, and small inductors. I had one batch of small inductors from a Wurlitzer that were excellent for screen and preamp supply filtering. Some circuit sections could be a great start to guitar pedal effects, such as if it had a vibrato section.
