I work at a Dodge dealer, and can tell you we sell them with between 1 and thousands of miles.
Never assume they will flatbed a DX'd truck, it's common practice to drive it, since alot of the time we trade trucks.
I actually flew to new hampshire, and drove a truck back(450 miles) for a customer of mine. She had np problem with the miles, but insisted I be the one to go get it.
A vehicle at our dealership isn't considered a demo unless it has 3000+ miles on it.
Some of you guys are quite anal, pretty much the reason I got out of sales, because some people are ridiculous about minor things. If you want something with just a couple miles, then factory order it and tell them you don't want them to drive it as part of the PDI process.