A rare copy of the US Constitution that was found inside a filing cabinet sold for $9 million at auction this week. It took just seven minutes for the nearly 237-year-old document to clinch its hammer price, Andrew Brunk, the owner of Brunk Auctions, told CBS News. Most bids were placed over the phone, while two came in online and one buyer was at the North Carolina auction in person, Brunk said. The final price, including the buyer’s premium, was $11,070,000. The buyer will remain anonymous.