1. When buying a car, research the vehicle's history, mechanical condition, fuel economy, safety ratings, features, warranty, and financing options.

  2. Before selling a car, clean and detail it, make any necessary repairs, and set a fair price based on its condition, mileage, and market value.

  3. Consider using a reputable dealer or online platform to buy or sell a car, and be wary of scams or fraud.

  4. Don't be afraid to negotiate the price or terms of the sale, and be sure to have all necessary paperwork and documentation completed and verified before completing the transaction.