re: Do Dodge Rams have the same kind of longevity as Chevys/Fords?

A couple of thoughts.
Why would a Audi dealer be selling a Ram pick up. I doubt that they traded for it. So they probably bought it at auction. NOBODY sells a good pickup at auction. You sell it retail, as a dealer or a individual.

Second, I don't see a link for a Car Fax report. Today all reputable dealers have Car Fax reports on the pre owned inventory and if they are not certain the report shows a good clean vehicle they usually wholesale it.

So be careful what you wish for.