I was wondering that also. I have one of the Sarkas. Of course it's all SS, except for the burner itself, which is cast iron, and the wheels, which are plastic. There is absolutely no rust on it and it sits outside year-around. There was an AgTalker acquaintance that sold the Sarka product. Perhaps he'll chime in.

The only problem I've had with it in 11 yrs (I think) is the hood thermometer. The glass breaks. Replaced it once & the glass broke again. I don't worry about it now. I also replaced the igniter once.

Mine runs on NG.

Here's old discussion on Sarkas on AT. It would be interesting to know if they're all still around.

https://talk.newagtalk.com/forums/thread-view.asp?tid=97953&DisplayType=flat&setCookie=1

Looks like they might still be made by the Sarka Bros. in Ohio

https://www.facebook.com/Sarka-Bros-157765104277082/