Walmart offers the Intex Twin Classic Downy Airbed Mattress in Blue, model no. 68757WL, for $7.97. Opt for in-store pickup to avoid the $5.99 shipping charge. That's tied with our December mention and the lowest price we could find today by $6. It measures 39" x 75" x 8.75".
Pool Supply World via eBay offers the Lay-Z-Spa Miami Inflatable Portable Hot Tub, model no. 54124, for $299.99 with free shipping. That's the lowest total price we could find by $22. It seats four and includes two filter cartridges, a reinforced spa cover, and floating chemical feeder.