I know alot of dealers to use NADA also they are a little higher.
Something to think about too, is the fact that if you would go trade in that truck with all the trimmings most dealers do not look at what aftermarket stuff it has, that usually adds no value to the vehicle, it may even sometimes hurt it. So dont let them sell high on the fact that it has all that stuff, because they prolly did not give enough for all the extras when it was traded.
Just my 2 cents
Neal