Sorry to tell you this artifact can't be worth much. Such appliances were built to well outlast their obsolescence (the good 'ol days...) and not only have they, but people never quite get rid of them, for they're immortally functional, in theory. Waffle irons. Fondue pots.
I had an old typewriter - one of the first, and a beautiful work of engineering - it operated perfectly and had no price at all on the antique market.
I've actually got an old foot-treadle powered sewing machine - big device of cast iron with oak cabinet and art deco sphinxes embellishing the sewing machine itself. It runs like the breeze through thick denim and leather, and might fetch $20 for a dentist's waiting-room or a tailor's front window. The crayon mark is still legible from the garage sale where my grandmother bought it in 1970: $5. Makes a nice stand for the TV.
Most valuable antiques (besides collectibles) cheated mortality. They're usually frail and were once thought worthless, even embarrassing.