Pool Supply World via eBay offers the Lay-Z-Spa Miami Inflatable Portable Hot Tub for $299.99 with free shipping. That's tied with our February mention and the lowest price we could find by $47. It seats four and includes two filter cartridges, a reinforced spa cover, and floating chemical feeder.
Amazon offers the Intex 15-Foot Easy Set Pool Set for $178.68 with free shipping. (Jet.com charges the same.) That's the lowest price we could find by $41. The set features a filter pump, ladder, cover, and ground cloth. The pool measures 48" x 180" x 180".