Priced too high for OfferUp buyers, plus its a smaller circle of potential buyers (locals)
Not fancy enough for Str8uptoytrader (not knocking your rig, but that baller town classifieds)
As already stated...Not cheap enough for the selective GD.com buyer , specially because its gas.
Its a great truck, the price is not unfair either.
Pay a few $ and have it listed on the online national sell sites.
If your feeling froggy, list it on CL and unleash the beast, you'll get plenty of traffic further than OfferUp, etc.