I have never dealt with Hagerty, but I would ask the adjuster exactly what you asked us. They, better than anyone, should understand that there are a few parts worth keeping for your next Z. They might, however, offer you a buy-back. I totaled my wife's 4Runner in December when I hit a deer and I bought the wrecked truck back from State Farm. They said all or nothing as they wouldn't let me swap or take any individual parts. As much as it hurts to see your wrecked baby in the garage, a parts car is a huge benefit when building a new one. It looks like the hatch, rear bumper, rear suspension, much of the interior, the engine, trans, a few of the wheels, etc, etc are still good and can be reused.