My siblings and I are trying to sell Dad's homebuilt since he passed away. He never flew it due to some health issues and FAA regulations changing, maybe before the 1990s. Everything was left in a trust so we can prove the chain of ownership for the plane. That's not the problem. Our issue is that the plane was never registered after building it, and it was never flown. Can we legally sell this plane since it was never registered? Any potential owner will have the full background story, of course. It was completed and assembled for photos, and then the various pieces stored indoors. Thanks for any insight on this.