(IDAHO FALLS, ID) – An Idaho Falls mansion built by a man now serving prison time for running a Ponzi scheme is now going up for auction. Daren Palmer’s home, which is still unfinished, cost an estimated $6.9 million to build. The last listing price was $1.9 million. The six-bedroom, 16,000 square-foot home features a theater room, indoor water fountain, and a sauna. Interested bidders have until Dec. 12 to qualify, and must put down a $20,000 minimum bid.