Costar.com is a company devoted to selling information on the Real Estate market, both for the US and the UK. Its products are mainly directories and inventories of properties for sale and sale registries, which Real Estate agents can use in order to produce valuations and quotes, or just get market insight. The company also sells a package of newsletters and reports on these collections of information, advertising and marketing solutions for all sizes of Real Estate firms and Realtor listings for the US and the UK. The site also allows individual sellers to display their offerings for free provided that the listing has a nationwide reach (there is no data on international listings).