The job duties of a used car manager include managing the used car department of an auto dealership. Your responsibilities usually include managing automotive inventory, marketing, sales, and deciding the price of each vehicle. You work on purchasing quality used cars for your dealership’s inventory and negotiating with retail and wholesale buyers. While overseeing the auto sales, you may liaise with members of the financial services industry to help facilitate financing and loans for your customers. In this position, you are ultimately responsible for setting and achieving sales goals.