Unless you're after a rare variant, import. If you can find a bargain, import. Or else, buy local. Its not worth the hassle and risk.
Having said that, how do you know for sure 100% if the mileage are geniune? Ask yourself that question. Even if they have logbooks, you'll never know for sure. So long as the motor's healthy and everything's sweet, I dont see why you shouldnt get a car with higher mileage.