Provision of an online marketplace for buyers and sellers of downloadable digital goods, namely, art images, music, video clips, and collectibles, all authenticated by non-fungible tokens (NFTs); Provision of an online marketplace for buyers and sellers of goods and services; Infomediary services, namely, facilitating transactions between buyers and sellers through providing buyers with information about sellers, goods, and/or services; Online retail store for virtual goods, digital content, non-fungible tokens used with blockchain technology to represent a collectible item; online trading services in which sellers post products or services to be offered for sale, and purchasing or bidding is done via the Internet in order to facilitate the sale of goods and services by others via a computer network; providing evaluative feedback and ratings of sellers' goods and services, the value and prices of sellers' goods and services, buyers' and sellers' performance, delivery, and overall trading experience in connection therewith; providing a searchable online advertising guide featuring the goods and services of online vendors; providing a searchable online evaluation database for buyers and sellers