As with most muscle cars,
As with most muscle cars, especially Mopars, a lot of the buyers are enthusiasts with a love of Mopar above all else, and history and tradition go hand-in-hand with that. There's a lot of sentiment there, and though 6 forward gears as opposed to 3 or 4 is a big difference from the early muscle car era, I believe that a lot of these will be purchased by people that just want the car and don't care about being two or three tenths faster on the quarter mile, if they even ever see the drag strip. The name "High end tuner" makes me assume that you're completely devoured by the idea of being the fastest one out there... that's not the case for everyone.
Granted, the way that things are going, more people are driving automatics because they're easier and people have gotten complacent and lazy behind the wheel, but in the world of enthusiasts and purists, manual is sometimes the only option.