Instructions
Locate an online price guide that lists the most recent values of NBA cards. Many card-collection magazines offer online guides. Tuff Stuff Magazine offers free downloads of card-value guides for nearly every sport played.
Visit the website for Tuff Stuff Magazine for the NBA card guide. The guide is about one season behind the latest cards available as the latest cards are featured in the magazine.
Locate guides for purchase that are up to date. Some examples include Sports Lizard Online and Beckett.com. These services charge a monthly fee for access, with Sports Lizard Online offering near real-time pricing.
Check auction sites such as eBay to see what some popular NBA cards are selling for. This might not give you an exact value, but it can give a ballpark figure of the values of some of the cards in the collection you own.
Buy a magazine subscription or annual card guide from companies such as Beckett. This option might be a good idea for those with collections that have cards not listed in the free guides or for those with card collections beyond the NBA.