Serta Perfect Sleeper 11 Inch Twin Gel Memory Foam Hybrid Mattress, Medium, USA Built, 100-Night Trial, CertiPUR-US Certified - Tranquil Wave,White and Light Blue is up for auction in Home & Kitchen. The current bid is $310.00, 52% below the $649.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.