A used secondary battery reuse system that supports reuse of a used secondary battery used as a secondary battery for vehicle driving, the used secondary battery reuse system comprising: a storage unit configured to store position information of each of a plurality of trade-in facilities for trading in a vehicle on which the secondary battery is mounted; a purchase request information reception unit configured to receive, from a purchase applicant who wants to purchase the used secondary battery, purchase request information for the used secondary battery including an intended use of the used secondary battery and position information of a delivery site, and store the purchase request information in the storage unit; a trade-in request information reception unit configured to receive, from a trade-in applicant who wants to trade in the vehicle, trade-in request information including information indicating a degradation state of the secondary battery mounted on the vehicle; an extraction unit configured to extract the purchase request information including the intended use of the used secondary battery that matches the degradation state included in the trade-in request information; a sale price determination unit configured to determine a sale price of the secondary battery to be traded in for the purchase applicant, depending on the intended use of the used secondary battery related to the extracted purchase request information; a transportation cost estimation unit configured to estimate, based on the position information of the delivery site included in the extracted purchase request information and the position information of each of the plurality of trade-in facilities, a transportation cost of the secondary battery to be traded in from each trade-in facility to the delivery site; and a trade-in price determination unit configured to determine a trade-in price of the secondary battery to be traded in in each trade-in facility, based on the sale price and the transportation cost of the secondary battery to be traded in; wherein the purchase request information reception unit is configured to receive the purchase request information including information designating a desired delivery time of the used secondary battery to the delivery site, wherein the used secondary battery reuse system comprises a required degradation state determination unit configured to determine a degradation state required at a time of trade-in of the secondary battery to be traded in, based on the intended use of the used secondary battery and the information designating the desired delivery time included in the purchase request information, and wherein the extraction unit is configured to extract the purchase request information corresponding to the degradation state required at the time of trade-in of the secondary battery to be traded in that matches the degradation state included in the trade-in request information. a storage unit configured to store position information of each of a plurality of trade-in facilities for trading in a vehicle on which the secondary battery is mounted; a purchase request information reception unit configured to receive, from a purchase applicant who wants to purchase the used secondary battery, purchase request information for the used secondary battery including an intended use of the used secondary battery and position information of a delivery site, and store the purchase request information in the storage unit; a trade-in request information reception unit configured to receive, from a trade-in applicant who wants to trade in the vehicle, trade-in request information including information indicating a degradation state of the secondary battery mounted on the vehicle; an extraction unit configured to extract the purchase request information including the intended use of the used secondary battery that matches the degradation state included in the trade-in request information; a sale price determination unit configured to determine a sale price of the secondary battery to be traded in for the purchase applicant, depending on the intended use of the used secondary battery related to the extracted purchase request information; a transportation cost estimation unit configured to estimate, based on the position information of the delivery site included in the extracted purchase request information and the position information of each of the plurality of trade-in facilities, a transportation cost of the secondary battery to be traded in from each trade-in facility to the delivery site; and a trade-in price determination unit configured to determine a trade-in price of the secondary battery to be traded in in each trade-in facility, based on the sale price and the transportation cost of the secondary battery to be traded in; wherein the purchase request information reception unit is configured to receive the purchase request information including information designating a desired delivery time of the used secondary battery to the delivery site, wherein the used secondary battery reuse system comprises a required degradation state determination unit configured to determine a degradation state required at a time of trade-in of the secondary battery to be traded in, based on the intended use of the used secondary battery and the information designating the desired delivery time included in the purchase request information, and wherein the extraction unit is configured to extract the purchase request information corresponding to the degradation state required at the time of trade-in of the secondary battery to be traded in that matches the degradation state included in the trade-in request information.