There is a process for heating and weighing the ceramic rotors to determine if they are at end of life. I suspect that under normal use(no tracking) that the ceramic rotors will last a good 100,000 miles. The pads could be replaced and pricing is easily determined. I kind of doubt that there are many NC1s at high mileage (over 75,000 miles). Ceramic rotors are expensive to replace for sure. Curious as to why you are so concerned? Are you experiencing problems with your ceramic brakes? Mario Cano tracked his car many times and as I recall damaged a ceramic rotor because of a wheel used at the track. Perhaps he will offer his insight.