Cadillac's $300,000 EV Prototype Spotted On Road For First Time Cadillac’s $300,000 EV Prototype Spotted On Road For First Time GM released a series of images showing the Cadillac Celestiq prototype, with a mystical blue and white camouflage wrap, undergoing on-road testing around the company’s facilities in Michigan, according to autoblog GM Authority. The Celestiq …