This article describes the most famous and sophisticated platforms whose products are related to interior design, luxury goods, lifestyle and buying real estate. They are all designed for the super rich clientele. Each of them is unique in its own way, all of them have their own face and specialize in their products and services.
James Edition

This marketplace offers services for purchasing goods of the highest price category: from buying a private island, expensive real estate, planes and helicopters, yachts and expensive cars, watches from world famous brands and jewels, one-of-a-kind pieces of author's decor and extraordinary items belonging to luxury lifestyle. James Edition has offerings from all over the world. Its customers can be found on every continent.

It offers vintage furniture and lighting, antiques, modern models from famous brands. In addition, this American platform offers fine art and jewelry. 1stdibs originally started as a listings site for art dealers to sell offline, but the site was redesigned in 2013 to give buyers the option to purchase items online.
Luxury World Wide

Luxury World stands apart from all the existing marketplaces on the luxury decorating market. The platform is not a typical marketplace. It is the seller itself and organizes the work with clients, and is responsible for the quality of goods and their delivery. This is due to the fact that the main factories are its own, the other suppliers are long-term partners of luxury goods manufacturers.
Luxury World represents, for the first time, only luxury goods, produced in China or in the factories of South-East Asia. All the factories are unique manufacturers with centuries-old traditions. They mainly cater to the elite class in the region. Most customers are Asian billionaires. Only bespoke models, high end interior design.
Luxury World enters the world market under the brand name Luxury Silk Road and is supported by the Chinese government as part of China's luxury goods promotion program. The slogan of the brand is Luxury at Affordable Price.
The Platform does not work with a private client and focuses To Trade Only.
Pomono

This is a marketplace of resources for vintage and contemporary items gathered from a multitude of international galleries, stores, editorials, artisans and designers.
Passerini

This American online shop brings to your home a selection of the best designer products from Italy focusing on Italian design and craftsmanship.
Longest Stay

The Longest Stay is the online UK based shopping destination where discerning interiors enthusiasts can buy from our curated collection of designer furniture, unique Designer Home Accessories and Luxury Home Gifts. They have carefully picked from Top Designer Brands across the globe to bring you the most sought after and unique designer homeware collections.
Chairish

Chairish is the design world's ultimate destination for home furnishings and art. It's beloved by interior designers and tastemakers—who come for the rare vintage, antique and contemporary pieces, and stay for, well, lots more of that, with 2,000+ expertly edited items added daily. Every month, millions of shoppers strike gold (or lacquer, or marble, or ornately carved wood) on Chairish, a platform where buying and selling is smoother, more sustainable, unexpectedly intimate, and always, always delightful.