Besides from getting a real non tempered meter, the next thing to consider is where n how the owner drive the ride.

If the owner always drive in city with most of the time trap in traffic jam, u need to at least 2X or 3X the meter Km as the engine is still operating, wearing down even during traffic jam. Thus why a lot of city cars are easy to accumulate carbon and start parts failing even with low mileage after 3~5 years due to long time period idling.