Marketing
While the determination of whether something is a "good" is useful for knowing whether Article 2 applies to a transaction, the term good may also be divided into several categories for marketing purposes. For instance, consumer goods are often classified in one of four categories: (1) convenience goods, (2) shopping goods, (3) specialty goods, and (4) unsought goods. Convenience goods (e.g., toothpaste, groceries, and hand soap) are generally inexpensive and are often promoted by differentiation in prices and widespread availability. Shopping goods (e.g., cameras, televisions, and clothing) are more expensive than most convenience goods, and marketing focuses largely on differentiating one company's goods from a competitor's. Specialty goods (e.g., Rolex watches, Lexus vehicles) are typically very expensive, involving marketing that emphasizes the uniqueness of the brand and status. Unsought goods (e.g., burial insurance, thesauri, etc.) are usually not heavily marketed, as demand and distribution are relatively low.

Source: R. Kerin, S. Hartley, E. Berkowitz, and W. Rudelius, Marketing (New York: McGraw-Hill/Irwin, 2005), pp. 264–265.