Around $1200.00
I have found that low profile tires roll straighter and do not flip cars like large tires.
I have had a couple of blow outs over the years and large timer cause the most trouble controlling the car.
Low profile tires don't cause as much, and yes I have had a blow out with one .
So with a 18inch wheel I can run low profile tires and not change the overall wheel/tire height.
Also I am now running about 2 inch wider tire and one with more traction, traction that means more safe control in lane changes, fast curves, and more import STOPS, shorter stops.
I am running high performance tires, and they look good as well.
Note the Van behind the Mercury, it also has 18inch wheels and performance tires.
Rich