Collectors Universe Inc. provides third-party authentication, grading, and related services for rare and high-value collectibles consisting of coins, trading cards, sports memorabilia, and autographs. It offers independent coin authentication and grading services under the Professional Coin Grading Service brand; independent sports and trading cards authentication and grading service under the Professional Sports Authenticator brand; and independent authentication and grading service for vintage autographs and memorabilia under the PSA/DNA Authentication brand. The company operates certified coin exchange, a subscription-based business-to-business Internet bid-ask market Website, certifiedcoinexchange.com that features approximately 100,000 bid and ask prices for certified coins; and collectors corner, a business-to-consumer Website, collectorscorner.com, which features approximately 95,000 collectibles listed for sale. In addition, it publishes magazines that provide market prices and information for certain collectibles and high-value assets, which are accessible on its Websites; and authoritative price guides, rarity reports, and other collectibles data to provide collectors with information. Further, the company sells advertising and click-through commissions on its Websites, as well as in the magazines; and manages and operates collectibles trade shows and conventions. Collectors Universe Inc. was founded in 1986 and is headquartered in Santa Ana, California.