JKeith, you're going to have a hard time something here in Ca. I sold my 04.5 around July this year with plans to buy an 2014 but have been looking at used trucks also.
The 3rd gen trucks in Ca that are good shape are going to cost over blue book. CTD owners in Ca are really, REALLY proud. I was looking at another 07 (70k miles) with a 5.9 engine two days ago. I wanted it but I wasn't going to give him $39k when I can get a discounted 2014 for about $50k.
Use the Craiglist search temprest to search statewide or another online resource that I like is cars.com or autotrader.com.
Good luck with the searching. I have a feeling I'll end up buying new since the used prices on Dodge diesels are flat out stupid right now.