Amazon offers the Masterbuilt 40" Propane Gas Smoker in Black, model no. 20050211, for $156.79 with free shipping. That's the lowest total price we could find by $38. It features 1,307 square inches of cooking space, four chrome smoking racks, stainless steel burner, porcelain-coated wood chip tray and water pan, push-button ignition, and temperature gauge.
Update: Walmart now charges the same.