B&H Photo Video offers the Kamp-Rite Kwik Cot, model no. FC711, for $32 plus around $11 for shipping. That's the lowest total price we could find by $5. It supports up to 300 lbs. and measures 29" x 79" x 19" when unfolded.
The cot at the link is $34.99 (50% off). So add $11 shipping = $45.99.
On Amazon it is $48.30. I'd seriously consider Amazon for the extra $ (5% back on Amazon card) due to better customer support and return policy except that I don't think B&H charges sales tax for our state.