Nissan gt-r LM (not Forza edition) is absent in auction house after last update and I cannot sell it now. I can put it on auction but there is not an option in the car list in the search window. Only FE version is there.
You probably figured this out already, but I ran across the same thing today and in case anybody googles this and stumbles upon this thread: It’s the “GT-R '95” in the auction house search.