1. Built in navigation is nice....NOW. AS years go by, the maps and points of interest become outdated and built in is often difficult or even impossible to update. How often do you actually NEED navigation? Then for $900, you can buy quite a few portable systems!
2. The wheel well liners keep mud and other crude from reaching the body, and if you ever drive on winter treated roads, they are are even better! They also add a nice finished look to the vehicle.
3. Transmission PTO: when would you ever use it? Useless unless you are building a wrecker.
4. Fifth wheel prep: unless you have a 5er now or are buying one, forget it.
5. Tail gate step: you have it now and like it. Why would you consider not getting it again?
6. They only came off 8% MSRP. With the 3% holdback, they are disounting 5% off MSRP. Considering they will not floorplan the truck, they are not giving you that great a deal. They know how bad you want that truck, and are playing you like a fiddle.