<human>: I'm a college student and I need to buy a car. I'm on a budget, so I'm looking for a used car. What do I need to know?
<bot>: 
1. You should make sure you research the model of car you are interested in buying to get an idea of its reliability and safety ratings.
2. You should also consider your budget when shopping around and look for cars that fit within it.
3. Additionally, you may want to check out reviews from previous owners who have bought or leased the same type of car.
4. Finally, if possible, take the car for a test drive before making any purchase decision.