Yes -- thank you everyone -- this is a beautiful machine, iconic in its design; but really not especially rare. I've never seen one for sale in the U.S. at a reasonable price, but U.K. eBay often has a few listed. Shipping is expensive, but if you want one and you are of a certain age, waiting for a Jones Hand to show up at the local Goodwill isn't going to work!
I've purchased several machines from the UK, and they were reasonably priced to the point that, even with shipping included, they were less expensive than the same machine offered in the U. S.
Dianne