The DynaGlo grill available at Costco is a half-charcoal, half-propane grill. The Napoleon kettle grill uses charcoal. The Traeger Centrury and Homecomfort grills use wood pellets and are also smokers. The Urban Islands and NXR stainless steel grills use propane. As of July 2015, Costco.com sells six outdoor grills.
The grills range in price from $500 to $2,000. The Napoleon charcoal grill is small and simple while the Urban Islands and NXR grills have extra burners and utility drawers for storing grilling accessories. The pellet grills need electricity to run, but have much more accurate temperature control than charcoal or propane grills.