What is this worth?

I have zero experience in hot mops, so maybe some of you guys can assist me on this one…

Someone I know has this & I told him I would see what the going rate is.

I don’t know how old it is, either.

If anyone is even remotely interested, this is in Texas.

It is just a hot tar kettle that uses kerosene instead of propane for the burners.

The thing needs to be lit to see if the tubes have rusted through with any holes in them.

If there are any holes, the tar will get inside the tubes and blow black smoke relentlessly.

Worth about $ 500.00 tops.