Again, a recognised dealer is the safest way to buy second hand. You can buy privately or at auction but as these are riskier, you really need to take someone who knows what they're doing or better still have the car inspected professionally.

1. Always stick to the model you intended to buy and don't be distracted by other cars. If there's a particular car you want, drive several before you go to auction or start looking at privately advertised cars.
2. For private sales, ask to see service receipts and MOT test certificates, not only can you see how well the car has been maintained but it will help you check that the mileage is genuine and the car isn't stolen. See the car at the seller's address so you can make sure it's not being sold by a dealer on the side.
3. High mileage needn't be a deal breaker. Many modern cars can clock up 100,000 miles plus and not have lots of problems, especially if it's been used for lots of motorway journeys - this can leave the engine in better shape than a lower mileage car that's been used for short journeys.
4. Look at the service history. Authorised garages will fill out and stamp the service book or log, after services. A full service history means a car usually get a higher price. Always check that the car has a recent MOT certificate.
5. Does the mileage seem reasonable for the age of the car? If the mileage is high, look for telltale signs such as wear on the drivers seat and footwell and pedals.
6. View the car in daylight to get the best look at the bodywork.
7. The car might have been in an accident so look for newly retouched paintwork and rust. Examine the tyres to see that they've worn evenly and make sure the car sits evenly on its suspension.
8. Look under the bonnet for any obvious leaks.
9. Start the car and listen to the engine – does it sound like it's running well or are there any unexpected sounds? Check the exhaust at the same time, looking out for excessive or blue smoke, which can be signs of a worn engine.
10. Look at the locks. Normally one key will open all locks and the ignition. If not, the car may have been broken into or involved in an accident and a lock replaced.
11. Go for a drive in it – make sure you try the brakes, steering and change the gears. The car should drive evenly without pulling to one side. It should be easy to change gear. Look at the dashboard instruments and warning lights to see if they're functioning properly.