Recycling is one of the most important solutions for reducing material and energy consumption, and that of end products is considered as the most effective one. To promote recycling of end products, this paper discusses the requirements for information system platforms, in which people can anonymously exchange their owning end products through auctions, while assuming that the major barrier for people to be involved in these auctions is that people who sell, buy or use products can be traced by entities that manage auctions. It is also shown that these requirements can be satisfied by the state of the art technologies.