The answer to that question is both. If you buy a used car, chances are you are stuck with it after the purchase.
Being armed with the Pre buy inspection and Carfax will make your negotiations stronger and more favorable. These two tools can save you the money and headache of car problems before you buy.
Another important bit of information is that some sellers will not allow a pre purchase inspection. They will come up with an excuse as to why that is a bad idea or not allowed. If you find a seller that will not allow you to take the car to us for an inspection then try these options. Ask them to drive the car to us for the inspection. This allows the seller the piece of mind on driving the car themselves rather than a stranger. Leave your car with them until you return with their car. Sometimes this is a workable idea as they have your car, you are less likely to leave it if you are stealing theirs.
Above all, listen to your service advisor and the report, we are on your side, you are our customer and we will be straight with you.