I have a Reznor F-250-H, High Altitude model, 250,000 btu commercial furnace. This unit was included with my shop when I purchased it. It could be gently used but looks new, like it was not hooked up. I have no way to hook it up and test it for you. So please be knowledgeable and bring your own meters to test. This is also why the price is cheap.
If the add is up, it is available. I will not respond to "is this still available ".