Good decision to go for a Lexus. They go on for ever as long as they are looked after. High mileage isn't really a worry as long as it has been properly serviced and maintained, which, it sounds as if it has. Some bits can be expensive for the Lexus, but at the end of the day you are paying for quality stuff which tends to last. Maybe you could find one with lower mileage for your money, but, you may find it has been thrashed or not looked after well. It's you decision at the end of the day, so, best of luck and I hope you geat a great one that gives you as much pleasure as mine.
Col..