You're probably familiar with the ANCAP crash testing and rating scheme in Australia. These star ratings are for new vehicles. For used cars, you'll want to refer to the Used Car Safety Ratings, or USCRs. These are published over at howsafeisyourcar.com.au. Bear in mind that the condition of the vehicle's bodywork and mechanical components plays a big part in its crash safety. Also, the level of corrosion is a key factor. Don't forget to check for any outstanding recalls on the vehicle make, model and build year.