TWIN**NOT KING** Size Mattress, 12 Inch Luxury Hybrid King Mattress in a Box, Medium Firm Mattresses with Cooling Gel Memory Foam & Pocket Springs, Double Additional Support, 365-Night Trial Black 12.0 Inches King (U.S. Standard) is up for auction in Home & Kitchen. The current bid is $36.00, 88% below the $300.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.