Well, I got impatient and already verbally committed to a truck.  2020 Cascadia 126 with a DD15 at 450 and DT12 with 3.08 rear end.  Southern truck, 350,000 miles, 75-80% rubber.  Pictures look extremely clean. Got it in the mid 40k range which was a touch more than I initially wanted but I got hung up on wanting the big block engine.  Planning to go get it Saturday.