<human>:  What should I know before buying a car?
<bot>: Before purchasing a car, you should consider your budget, the type of car you need, the availability and cost of parts, the safety rating, fuel economy, and the car's resale value. You also need to evaluate your financing options, research the vehicle's history and reliability, and decide if you will buy from a dealer or a private seller. Additionally, make sure to schedule a test drive to ensure the car meets your expectations.