Human: I am getting ready to purchase a used car. What should I look for in a used car that I should be cautious about? Assistant: 
You should look for signs of previous damage or signs of wear and tear like deterioration or rust. It’s also important to check the brake and tyre condition, as well as whether any fluids are leaking. It's a good idea to get a professional mechanical inspection of any used car you’re considering so you can make a more informed decision. Additionally, you should check any service records to ensure that all necessary maintenance has been done and that the car is up to date.