[68-69-70Nova SSL78]

Need so help. Looking thru the Supercars/Musclecars for sale section I ran across a Special Paint/Hugger Orange/Double dash 1969 Nova L78 (absolutely georgeous) for sale. It say's this a very rare/limited option. I also have a documented double dash/hugger orange/special paint L78 Nova, which is unrestored original (original motor, trans, rear end,etc.). I bought this car about a year ago about 30 miles south of Pittsburgh. My question is are these double dash/special paint cars really that rare? If anybody has knowledge on this issue it would really help. Thanks Ed