Abstract: Techniques for operating a marketplace service to manage on-line marketplaces so as to limit access to information regarding distribution of items (e.g., sales of goods/services). The marketplace service may manage multiple on-line marketplaces, with each on-line marketplace enabling a user to distribute to other users of that on-line marketplace information regarding items that the user has made available for distribution to the other users with access to that marketplace. In some embodiments, an on-line marketplace may be associated with a relationship external to the marketplace service, and the marketplace service may limit access to the on-line marketplace only to users who share that relationship. These embodiments may therefore enable users to exclusively distribute, via the service, information regarding a sale of goods or services to users who have a relationship external to the marketplace service, thereby limiting how widely information regarding the sale is distributed.