When my parents owned their 05 Duramax during the early DPF equipped trucks era, they would get asked if they wanted to sell their truck. Now that they own a 2016 Duramax with all the emissions equipment they never have been asked if they wanted to sell it.
For our farm/ranch use we only purchase non DPF equipped diesel trucks which as of now consist of (2) 5.9 cummins and (1) 7.3 Power Stroke.
Well, when Ford didn’t offer anything worth buying in a diesel pickup for over 10 years after discontinuing the 7.3, that certainly didn’t hurt the 7.3s value! But if you’ve looked, the “good” pre-tier IV trucks most all seem to hold their value a bit better than they should. Although later this year, might be a little different story across the board!