Dicker, offer, turn away, dicker some more. Sooner or later you will get a good price. Look around other dealerships in your area, one may be hungry.
Check the internet and get an idea of what prices are elsewhere (but know what base delivery prices are to your area).
Some people here buy from dealers in small nearby towns where costs of doing business are lower, but dealer servicing requires driving there or local servicing with a dealership unhappy with the fact that you bought elsewhere just to save a few dollars.

Good luck with your new truck!
Regardless of make, all are well-built and competitive. It comes down to selecting the model that fits your needs and also is within your budget.