I didn't think it would be common.
My daughter wants a free arm machine but tends to snub her nose at the more common Elnas. She does like yours though. The Pfaffs tend to go higher than I can spend. Some of the Vikings look pretty decent and so far I haven't ran across any Kenmores with all the parts. When I get her one I want it to be at least reasonably complete and I want it to look decent. The right one will come along.
Rodney