In Southern California on Craigslist:

2017 Ram 3500 Diesel 4x4 Crew Cab Long Bed & Callen Camper - REDUCED...
White 2017 RAM 3500HD SLT Crew Cab Long Bed (8ft) Diesel 4x4 64k miles Method Wheels Toyo AT Tires...
orangecounty.craigslist.org