You make a great point. For those who drive a car 3 to 5 years and do not exceed 100,000 miles there's a totally different set of parameters than for the person who drives it 12 years and 300,000 miles plus.
Toyota DOES build $50,000 cars, they even build them more expensive than that. You can find them easily. Look in your Yellow Pages for your Lexus dealer.
Have a great day,