Amazingly, a couple of years ago I was able to purchase a NEW c223t head with valves, installed from the dealer for around 1600$. This is after the previous owner blew 800$ replacing the head gasket only to find that the expansion chamber inserts had micro fractures in them, which the mechanic missed, and the gasket mating surface was no good and the vehicle continued to overheat. So have that used head checked real close.