Collectors Universe, Inc. provides authentication and grading services to dealers and collectors of high-value coins, trading cards, event tickets, autographs, memorabilia, and stamps in the United States. It offers authentication and grading services for coins under the Professional Coin Grading Service brand name; sports and trading cards under the Professional Sports Authenticator (PSA) brand name; and vintage sports autographs and memorabilia under the PSA/DNA authentication services brand name. The company also publishes authoritative price guides, rarity reports, and other collectibles data to provide collectors with information. In addition, it operates the Certified Coin Exchange business-to-business Website, certifiedcoinexchange.com, where dealers can sell and purchase certified coins and other certified collectibles; and Collectors Corner Business-to-Consumer Website, collectorscorner.com, a business-to-consumer Website where consumers can visit, identify, search, sort over, and select for purchase coins, trading cards, and items of currency that are certified by the company, as well as Collectors Clubs for coin and trading card collectors; and manages and operates collectibles trade shows and conventions. The company provides its services to dealers, collectors, and retail buyers and sellers of collectibles. Collectors Universe, Inc. was founded in 1986 and is headquartered in Santa Ana, California.