What the heck is this thing?

that's an interesting stove. I'm not sure I could take a liking to it but it's different. I'm curious who knows more about it.

That looks like a "circulator" (non EPA i.e. EPA exempt) no glass door and generally not efficient. They load from the side. There's currently another thread asking about one:

https://www.hearth.com/talk/threads/summers-heat-50-snc13-vs-wonder-wood-us-stove-co.109900/

the US stove wonderwood. Been recommended for shops and garages.
I think they retail for under $1k new so that may be overpriced.

They were popular in the late 60's through the 70's. We just installed one up in the boy scout camp cabin that was donated by an older gentleman to our troop. It's almost like brand new, don't think it's seen many fires. They aren't the most efficient stoves out there, definitely NOT worth the 800 clams that guy is asking for it......

King circulator at one time made by Martin Industries. People who have them think any thing else is just for looks.

Yep King circulator, fed one for eighteen years...... never going back.

I thought I had seen everything but have never seen one of those before. Looks more like a gas heater from the front.

Heck, TSC or Oshelins still sells them here.

Used to see lots of them. A lot of folks seemed to like them because the cabinet would not get so hot and therefore didn't have to worry so much about little Johnny burning his hands. They worked but most were inefficient. I don't know about the newer models but do know there are a couple companies still make them. We saw some when we stopped at a stove shop the last time we were shopping.

That looks like a shaker grate, and there appears to be a shaker handle layin' in that thing, it might be a coal, or a wood/coal stove.

I have seen something similar advertised called a Wonderwood. Wood/coal stove.

New to the forum...I'm currently using the ole King wood/coal stove you guys are talking about, out in my garage. Its been in my family for 34yrs, it accepts 22" logs and will burn more wood in a week than I can tote to it in a month!