Walmart has this Intex Twin 8.75″ Classic Downy Inflatable Airbed Mattress for only $7.97! (was $15.97)
The Intex Classic Downy Airbed is perfect for both in-home use and camping. It is easy to clean, and compact for storage. The plush flocked top provides a luxurious sleeping surface, while keeping the sheets in place. In addition, it has extra wide valve openings for fast inflating and deflating.