Need to buy auto parts?

Last week my in-laws visited us here and brought their old car truck to give it to us. In two weeks they will move out down south and they don’t want to bring that truck and decided to just left it here and give it to my husband. Thanks to my in-law for their kindness. Now we need to buy some auto parts because that truck has been stuck in the garage for a long time and hasn’t been use for quite a while the reason why its not running well. We need new Condenser, Evaporator and Receiver Drier, it’s a little bit costly but its better than to buy new one right? At least we can just buy those parts at buyautoparts.com, we don’t have to drive to the store.