LightInTheBox offers this Air Sofa in several colors (Blue/Black pictured) for $12.99 with free shipping. That's $31 off and the lowest price we could find. It measures 33" x 18" x 18" when inflated.

Note: This item ships from China and may take two to three weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.