There's a huge problem with odometer tampering, but you usually don't find it with reputable rental or corporate fleet cars.

We had a (Nissan) 350Z roadster and the seat controls are under the right side bolster of the seat. We'll comment on it. Or on the BMW, we faulted the I-Drive system for its user interface. Or they'll look at how you switch from AM to FM on the radio. On some cars, the engineers found they had to take their attention away from driving.

Watch out for those cars owned by salesmen or servicemen. Any educated consumer can look at a car and tell whether it's well maintained. Twenty-to-thirty thousand miles are common (for a rental or fleet car). Look at the odometer and the type of vehicle.

Buying a rental car from a reputable company makes good sense. You know they've been well-maintained and they're reasonably priced, for the most part.

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Know the company you're buying from, ... I would opt for purchasing directly from a Hertz or Enterprise. But I'd be careful of vehicles that come from corporations. They can generate lots of mileage.