To value McCoy pottery, use a pottery price guide to compare pieces similar to your own. As of 2015, McCoyPottery.com and Kovels.com offer online price guides for McCoy patterns. For an accurate price guide comparison, determine whether your piece is a Nelson McCoy, a Brush-McCoy or a vintage copy by examining its mark and physical characteristics. Use the McCoy Pottery Collectors Society's website, McCoyPotteryCollectorsSociety.org, for guidance on how to distinguish a copy from an original.
McCoyPottery.com offers instructions on identifying and pricing all available McCoy pottery categories. For guidance on identifying and valuing your McCoy, use the links on the left side of the home page to access details on each McCoy type. Nelson McCoy and Brush-McCoy pottery bear distinctive marks under their glaze that identify their classification and year of production. McCoyPottery.com has a Pottery Mark page for each manufacturer with images of their markings. Compare the manufacturer's mark on your piece to the images to determine whether you own a Nelson or Brush-McCoy.
The website also offers links to McCoy auctions, forums and its own McCoy store. Once you have identified the manufacturer of your piece, search these resources for pricing information on your McCoy pattern. Kovels.com features a price guide dedicated to Nelson McCoy pottery. For access to values for listed pottery patterns, you must create an account on the site. As of 2015, there is a free account option for basic access, and you can purchase premium access for a yearly fee. Browse the pictures on the site for any pieces that are similar to your own.
Use McCoyPotteryCollectorsSociety.org as a reference to distinguish Nelson McCoy and Brush-McCoy pottery from reproductions. The site lists the lines produced by each manufacturer, features detailed reproduction listings and displays photos of reproductions and trademarks.