Engine had an unknown oil leak that happened and the oil level dropped really fast with no engine warning light. Metal shavings all over in the oil/pan and I am replacing the motor. Local dealership has a new LS2 motor from GM on order and said they only need the intake manifold from the old motor(what they told me). A friend of a friend is interested in buying the old motor from me for a stroker project, dealership said its a $200 core charge for me to keep it. Would it be worth more than that to sell it to him? Have never had this kind of issue before so I am clueless as to what the old wrecked motor would be worth.