selling my king tempurpedic mattress. Only 3 years old. (Page 1/1) NickD3.4 JUL 18, 04:39 PM I'm considering selling my tempurpedic mattress it's a king. If anyone has ever wanted a tempurpedic bed, but has never wanted to spend the money (very expensive), hit me up. I'm willing to sell this at a greatly discounted price. It's only 3 years old. I still have the receipt and everything. Was $2,400 new.