A buddy of mine has two V8s pulled from a pair of Cadillac CTS' and is looking to sell. They're tagged and on a pallet. According to him, they've never been fired but i would assume that they've at least been tested once installed in the vehicle.
He's asking $3500 a piece, but i'm betting he's willing to negotiate. He said that when he ordered them they were about about $4000 shipped to him.
Links are of just one of the engines.