GT Auto. More GT-Rs in that place than anywhere ive ever been to in my last 8 years of import ownership, they must know a thing or two about them.
Engine noise and compression, previous damage, rust, warning lights on, no ac operation, crushed sill panels and floors, worn out interiors plus the usual wear and tear is where id start on any GT-R. There are some really nice ones out there still, gotta look and u get what u pay for.
Good luck with the search.