Some have had good luck with dealers giving decent trades. Me, not so much. I've looked at trading my Hellcat on 3 different new ones at 3 different dealers and all my dealings have been the standard low ball offer from the dealer.
I even looked at trading my 2016 Hellcat Challenger for a 2016 Hellcat Charger, similar miles and identical options, dealer wanted my car + $15k.
Good luck with your sale OP! I'd recommend Ebay and Cargurus, I got a lot of attention on those when I sold my Scat Pack Shaker. Not much action on the forums or autotrader.