That’s not a “brand new glider”. That’s a truck that they took the X15 out of and swapped in a Cat. Try and get some history on the engine and I bet they don’t say much. Also, ask how your home state handles transferring an “assembled” title from Nebraska. Would suck to pay that kind of money and end up with basically a salvage title depending on how your home state handles it.
Oh yes, it's not a brand new truck but new components and an overhauled engine. They are pretty much the only that does this anymore. I'm pretty sure this is the first time they've had inventory in 18 months and 12 months ago people were selling, or at least trying to, for +$270K.
And I'd agree there's no way it gets 7.6MPG on a consistent basis. Probably low 6's plus no DEF.