Yep, I picked up a mint M3 a few months ago. Little old lady bought it in 1958; it was moved 1 time for service a few years ago. Not a scratch on it. Tube spring reverb with separate cabinet. Leslie 25. Original receipts, manuals, brochures, bench, everything.
Of course, then I had to get a real Leslie (2 speed, full re-conditioned Leslie 45), which wasn't quite a steal like the M3, but man, oh man, the SOUND THE SOUND THE SOUND.
Added a Speakeasy tube preamp for using the Leslie with other sources (line or instrument level), and now the 25 is my main guitar amp and I can do that crazy Leslie vocal thing. Actually used the Leslie 25 on a pedal steel session yesterday. Crazy!