I just bought a used 13 copperhead R/T. 500 plus miles away from me. Never seen one in my town. After running the vin it turns out it was sold new from one of my local dealers. Go figure. She's back home!
When I had my 2010 the dealer I bought from has a silver and black one on the lot the same time as mine. After that I didn't see another one for a while. My local dealership saw mine and has ordered two R/T's since then, neither one selling in this 4x4 town.
Driving down the road in my town I've seen two other R/T's. I've seen some out of town but not many. I would say total I've seen since 2009 is less than 15 on dealer lots and on the road and I never saw an 09/10 on the road except mine. Ever since I got rid of my truck April 2013 I haven't seen one on a lot or the road.