human
What's the most important thing I need to know about buying a car?
assistant
The most important thing to remember when buying a car is to do your research. Make sure you understand all of the different features and options that are available, so that you can make an informed decision. Additionally, it’s important to take into account the cost of ownership, such as fuel costs and maintenance expenses, before making any purchase. Finally, don't forget to ask yourself if you really like the car you're considering - sometimes we get so caught up in the process that we forget to look at the big picture!