I thought the GTRs had carbon ceramic. I assumed this was the reason for the cost.
Dealer cost - the exact reason I own one of my cars. The valve and timing chain covers were leaking oil. The previous owner was quoted $1800 for repairs at the dealer. I bought the car for $600 and will be replacing gaskets myself.
I am 99% sure they never have. Should be brembo 2-piece non carbon ceramic rotors.