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FESTUS, MO (CNN) -- An unusual home is being auctioned off in Festus, Missouri. People are lining up to bid on the former roller rink turned cave home.

The home was built by William Sleeper, but due to his failing health he is having to sell. The three-story home has four bedrooms, two baths, and three chambers. Also, the home is 70 degrees year-round!

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