Don't think I've seen one of these before - except in a rusted heap on the Sacred Appliance Burial Grounds in SD. Very cool find - love that light gray porcelain drum!
Greg, I cannot believe you even asked that question. Of course it's electric. I know I"ve never seen the match to the pulsamatic washer. this is an extremely rare dryer. And it is not a condenser dryer, but flowing vented air.
Frigidaes first gas dryers were the 1961 line when they all became 27" wide. But Greg you should get this 1956 dryer and I will help you convert it to gas that might be fun.
I'd say make an offer on what you think it's worth to YOU, taking shipping into consideration. All they can say is no, or come back with a counteroffer.