It might be worth your while to look at a few different websites like Turbodieselregister.com or dieseltruckresource.com and take a look at the threads in the 4th gen forums to get an idea on some of those model years (both are dodge/ram truck forums). I think the 13's had some issues (as they all do) not that they haven't been fixed through software fixes etc by now. 46k for a 13 does seem high to me. I bought my 17 3500 crewcab, srw, 4x4, bighorn with a couple additional options which msrp'd for a 2kish for 51k. The Laramie is the next step up in trim level from the bighorn so it surely went for more to begin with but still seems high. Obviously take a look at auto trader or the like to see what comparables in the used market looks like and for new comparisons are going for take a look at someplace like Dave Smith or Dennis Dillon Ram to get a good idea of what the new ones are going for they both have quite a selection (currently dave smith has over 800 2500 and 3500 trucks)and good prices (not that they cant be beat). IIRC Dennis Dillon has their internet price on the page whereas Dave Smith you have to email for the real price. Dennnis Dillon at the moment has some 3500 bighorns with diesel for sub 50k.