Green Machine Ground Heater

I have a newer Green Machine ground heater for sale. It Is propane powered, has an on board generator, on demand boiler to heat the lines, and can thaw/heat 5000ft² pretty easily. It has a 120 gallon propane tank that can be filled at any place that dispenses propane. Clean burning, so you can use indoors or outdoors! Asking 25,000 OBO. These are about 67k new. Brand new Onan Generator! Thawzall