You triggered my memory to days in 1975-78 when I worked in sales at Avery Piano , at the time they were a Hammond organ and Steinway piano dealer. We routinely sold the spinet model called the "Aurora" at almost $5000, the larger model a console style was about $8000 as I recall we sold quite a few of those too. Both were big and lunky and didn't sound nearly as good as today's arrangers. That's the era when they dropped the tone generator system.