This deal has ended.
Walmart currently has the Coleman QuickBed Twin Air Mattress for $19.54. Shipping adds $1.97, or choose free Site-to-Store. Even with shipping, that's the lowest total price we could find by $6. It purportedly inflates in 90 seconds and features a double-lock valve. This mattress measures 74" x 39" x 8.5" when inflated. Sales tax is charged in most states.