King of Sound Sleep Single Size Retail Price: ¥79,800 Purchased in December 2020 for guests, but no longer needed due to moving, so I'm selling it. There are some stains, which I believe were present from the time of manufacture, as they were there when I purchased it. Please check the images and refrain from purchasing if you are concerned. The mattress has only been used a few times. It's in good condition with no sagging. Shipping included.