I am looking at a 2001 30" Jenn Aire stove with electric oven and gas burners. The store people knows nothing about it except the electric oven was checked out and appears functioning. My question is - is it propane or natural gas? Or easily converted to propane if set up for natural gas? What else should I check out before buying it? There is no manual with it. I have the model and serial #'s Thank you for any help you can give me, Doris at fibrfife@bestweb.net