Many name brand small appliance manufacturers make an 18-quart roaster oven, including Hamilton Beach, Nesco, Oster and Rival. Prices and selection may vary.
Roaster ovens of all sizes can be purchased at stores such as Target, Lowes and Wal-Mart and online from retailers such as Amazon and The Home Depot. Each manufacturer has built its ovens with useful features.
The Oster 18-quart roaster includes a buffet server and a removable rack and roaster pan for easy cleanup, and the Hamilton Beach roaster has an easy-to-use knob temperature control and a removable lid, insert pan and wire rack.
Roaster ovens come in many shapes, and some are made of stainless steel while others have a ceramic base. They come in a variety of colors to match any kitchen's decor, and an 18-quart roaster oven is large enough to accommodate an 18-pound turkey. Most roaster ovens made today have temperature controls ranging from around 200 to 450 degrees Fahrenheit, making them suitable for cooking a wide variety of meats and other foods.
Online, 18-quart roaster ovens typically range in price from around $40 to over $100, depending on the brand and its features, as of May 2015. Always shop around for the best deal, and be sure to read customer reviews before making a purchase.