35 Commercial negotiation services relating to real estate and luxury services, namely, private jets and yachts charter, art advisory, interior decoration, and wine brokerage services; business management of real estate programs; commercial administration of real estate; market study and research with respect to real estate; commercial intermediation services relating to real estate and luxury services, namely, private jets and yachts charter, art advisory, interior decoration, and wine brokerage services; promotion of real property; marketing relating to real estate; administrative services relating to the commercial business of franchises; assistance regarding commercial franchise management; commercial assistance services for the setting up of franchises; business consultation services in the field of franchise operation; advertising; advertising services in the field of real estate and lifestyle; auctioning of real property; on-line auctioning of real property; auctioneering services; auctioning of works of art and collectibles, including online; auctioning of virtual objects in online environments and virtual environments; auctioning of digital works of art and virtual collectibles; conducting of interactive virtual auctions; retailing of virtual objects for use in online environments and virtual environments; providing an online marketplace for buyers and sellers of encrypted collectibles; providing an online marketplace for buyers and sellers of non-fungible blockchain-based assets; operating online marketplaces featuring encrypted collectibles and non-fungible blockchain-based assets; promotion of airplanes and helicopters, and vehicles for locomotion by land and sea for the benefit of others; services provided in the context of airplanes and helicopters, and vehicles for locomotion by land and sea, namely, the purchase and resale of airplanes and helicopters, and vehicles for locomotion by land and sea for the benefit of third parties; online and retail services for the purchase and sale of airplanes and helicopters, and vehicles for locomotion by land and sea for the benefit of others; commercial management of a fleet of apparatus for locomotion by land, sea and air for the benefit of third parties; retail services for airplanes and helicopters, and vehicles for locomotion by land and sea; business advice, information or inquiry with respect to air transport; airline promotion services; presentation of duty-free products on any means of communication for retail during air transport; retail services for tax-free goods in stores in boarding areas or on board airplanes (duty-free goods); retail services relating to foodstuffs; retail services for prepared meals; retail services for beverages; arranging subscriptions to air transport services; outsourcing services [commercial assistance] in the field of air transport; commercial management and advice for users of blockchain technology, cryptocurrencies and involved in the development and operation of virtual worlds; commercial interfacing of companies in the field of works; services for the dissemination of vacation accommodation advertisements via a global computer network