Hate to break this to you Don but your estimate sale price is a bit high for a 2007 6.7 2WD truck :W
Plan on a delete OP with the early 6.7 engines, they do great deleted with a minor tune, so I've heard. 5.9 you can tune and get great HP/TQ improvements with the chance of tranny failures :( Or tune the 5.9 low and enjoy the ride for many miles.
5.9 is a pre emission engine, 6.7 is a DPF engine or no soot or black smoke.
Myself a 2007-2010 DPF engine was not the best of years for all brands because of the new emission issues from the EPA.
I'm thinking you already knew all this though :B