Taking my statement on its own could be confusing but when taking it in context with your statement which I quote it is obvious. For the price you paid I said you should have purchased the other headlamp if it was available, that is what I said because I am aware of the headlamp prices.
I am trying to see what the previous owner had done and how it could affect you now.
He changed the ignition and presumably the key, did he change the old chip into the new key? If not the car would not be able to start.
In the statement that I referenced you do not mention the the ignition switch or the key ring being included in the deal although previously you said they were.