bedroomfurnitureMattressesInsane $33,000 mattress has 10 pounds of cashmereWednesday, June 16, 2010 - 12:47pm Look, I'm all for having a good night's sleep. It's important! But I'm not sure that spending $33,000 on a mattress is worth it. But that's how much you'll pay for a king-size Palais Royale mattress and box spring from E.S. Kluft & Co.