When you talk about why people prefer something over something else then you need to understand and realize that every person has different circumstances and is facing a different situation in their life. Every situation in life is different and requires a different decision that can help in the solution. Most people prefer to because people usually prefer to buy cars that fall in their budget. Since cars are expensive therefore most people decide to get something that does not put a lot of burden on them. What other reasons might be there for people to prefer used cars?