Hi there.  New to the site.  My mom has a US Army Cannon Heater that she'd like to sell, but has no idea what it would be worth.  It was used by us when I was little as our only source of heat in the house.  It's a pot bellied stove with US Army Cannon Heater on the door and has a round "vent" in the door that you'd turn to let in more air.  On the vent it says 18 on one side and 20 on the other.  On the top it says 15.  There is other writing but it was too dark in the shed to see.  I can get that information if needed.  Anyone have any idea of its worth?  I saw one just like it but with diffrent numbers at a web site that wanted $2850.  Is that possible?  My mom could sure use that kind of money if it is!  Also, how would I go about selling something like that.  Anyway, any information would be helpful.  Thanks.