Best bet is to hold on to the truck. Sales and prices are way down and the market seems to be flooded. Things will change but not in the near future.
I saw a news cast about trucks and suv's and the advice was to keep the truck and figure out how to reduce fuel consumption because you'll lose your butt. Me, I bought a 150cc scooter @ 100 mpg that I use for short trips and I'm looking for a small 4 banger pu to do the rest. My 6.7 dually stays

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7.5 3500QC 6.7CTD 68RFE Build date June 2007
Superchips tuner 3808, Boost/EGT Laser Gauge, Airaid cold intake