What is a good mileage to look for in a Honda Civic, Scion xB, and Toyota Prius to be used for a few years without too many problems?

I'm looking at the above mentioned cars to be used for 1-3 years, but I do not know the mileage to look for. I d like to know the milage lifetime for each car mentioned, and approximately at how many miles the car will survive without having consistent problems. If you could give me the answer for each kind of car, or even one of them it would be greatly appreciated.

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