Sportstorms via eBay offers this Portable Folding Military Cot in Blue for $27.39 with free shipping. That's the lowest total price we could find by $13, outside of the mention below. It measures approximately 75" x 12" x 22" and features mildew resistant fabric and a steel frame.

A close price: gold3288gold via eBay has it for $28.50 with free shipping.