Patent ID: 6904410

Claim:
A computer-implemented method for permitting users in a data network to manage inventories of their collectibles, said method including: storing a computer-implemented database of collectibles, the database of collectibles including object classes indexed at least by primary classes and subclasses; storing user inventories of instances of the object classes, including instances that each user has, instances that said each user would like to sell, and instances that said each user would like to buy; storing user information for controlling access of the users to their respective user inventories; providing access of the users to their respective user inventories for inspecting, editing, and adding the instances to the user inventories, and for valuing the instances in the user inventories, and for insuring the instances in the user inventories; and finding buy-sell opportunities between the users when one user has an instance of at least one object class that said one user would like to buy and another user has an instance of said at least one object class that said another user would like to sell; which includes adding instances to the user inventories by displaying to each user a list of object classes from the database of collectibles, and next to an identification of each listed object class, displaying a button for said each user to click on to add, to said each user's inventory, instances of the listed object class that said each user has; and which includes labeling the button with a number indicating how many instances of the listed object class that said each user has.