In case you’re on the market for a new mansion, tech entrepreneur David Spafford and wife Susan are selling their 24,127-square-foot home. It’s listed with Coldwell Banker and has five bedrooms, 10 bathrooms, 4-car garage, a home theater, indoor jacuzzi, 2 kitchens, tennis court, and a game room. The home is located in Holladay, Utah, right outside of Salt Lake City. David Spafford co-founded the Megahertz Corporation in 1985, which he started in his basement when he was a student at the University of Utah. The company became the top manufacturer of laptop computer modems, and was sold to US Robotics in 1995.