The used truck is insane at the moment. Trucks are very in demand, and holding there value quite well. I've seen 2 year old trucks with 50k miles, and they are only like 3 grand less then a comparable new one. They have to have like 100k miles on them and beat up, to find any sort of deal. I have been considering getting a new Pick up, and after months of watching the market, and talking to friends in dealerships, the best bet is to wait from some of the killer promotions they are offering, along with low financing, for new trucks. If you wait for the right promo, and shop around, you can get 10K under MSRP.
For new Rams, you can get new 2017 and 2018s right now for some great prices. The 2019 is a new generation, and are quite a bit more(but they do have some amazing tech)