Update: This deal is over. Now sold out. One of their summer specials, Walmart.com has this Heritage Metal-Walled Swimming Pool on sale for just $299 after a substantial $100 price cut. Measuring 12' diameter x 36" high, this features a galvanized steel frame, all-weather vinyl liner, and includes a thru-the-wall filter system with attached pump and a ladder. Standard shipping is only $19.97, site-to-store pickup is free, and sales tax is charged in most states.