Avenco Tri-fold Mattress - 4 Inch Single Size Portable Floor Mattress with Breathable & Washable Cover | Foldable Memory Foam Topper for Guest Room,RV,Travel,Camping,White 4 Inch White Single is up for auction in Home & Kitchen. The current bid is $3.00, 95% below the $58.34 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.