N960SA is taken. It's currently assigned to a 2022 Compagnie Daher TBM 700 registered in Wilmington, DE.
See the full aircraft record →A tail number only frees up if the owner deregisters the aircraft or moves it to a different N-number — and even then the FAA holds it before releasing it to the public.
N960SA has been worn before. Past registrations from FAA deregistration records:
Tails one nudge away from N960SA that aren't assigned or reserved: