Abstract: Systems and methods facilitate an automatic object exchange between users. The process comprises receiving an exchange condition from another user's computing device after a user's exchange condition has already been received. Once a matching process identifies the user's object as a potential exchange object, the another user's computing device displays that object and allows it to be selected as an exchange destination object in an exchange. The execution of an exchange program is triggered by the another user's exchange condition, and not the user's exchange condition. The exchange required no financial transaction between the users, e.g., if an exchange destination price of the user's object is lower than an exchange source price of the another user's object.

Abstract: The present invention provides an information processing device including: a storage unit that is configured to store an object ID of an object, a user ID of a user owning the object, a first price of the object, a second price of the object, and an exchange condition of the object in association with one another; a price setting terminal that is configured to determine the first price; an appropriate exchange object selecting unit that is configured to select an appropriate exchange object in accordance with the exchange condition; a price comparing unit that is configured to compare the second price of an object of an exchange destination selected by the appropriate exchange object selecting unit with the first price of an object of an exchange source; a payment amount calculating unit that is configured to determine a payment amount of a user owning the object of the exchange source; a first transmission unit that is configured to notify a user terminal of the user owning the object of the exchange source