retail services for products of others; retail store services; retail services provided by means of mail order catalogs; wholesale ordering services; sales promotions at point of purchase or sale, for others; sales demonstration for others; advertising, promotion and marketing; sales promotion for third parties; providing information and advice to consumers regarding the selection of products and items to be purchased; providing an online marketplace for buyers and sellers of goods and services; provision of an online marketplace for buyers and sellers of goods and services