. Most were sold by the liquidator "Protecto Enterprizes" of Barrington, Illinois through mail order sales. The Interact Model One Home Computer debuted at the Consumer Electronics Show in Chicago in June 1978 at a price of $499. The majority of sales were thru Mail Order houses and you could buy it off the shelf at Highland Appliance in the Detroit, MI area and Newman Computer Exchange in Ann Arbor. Probably the most successful application available for the Interace was a program called "Message Center"