I have a two-year-old king-sized Serta icomfort Adapt Tempur-Pedic mattress for sale. I got it in June of 2024 from Ashley Furniture for $3,200. It is a Serta Adapt Medium firmness mattress. It is firmer than what my wife and I like so it was only used for a couple of months. It had a protective cover over it the whole time it was used. Unfortunately, my son used it for a sleepover and it now has two small stains on it now. It has been stored for the last 18 months. I'm asking $250 or best offer.