This post reminds me of a Nissan 4x4 I test drove in 1984 before buying my first truck. The test drive truck had 230 miles on it and sand in the bed. I forget exactly what the dealer's explanation was, but it went something like "we're out in the country and people go on long test drives." I didn't buy from that dealer.
I have to admit it was a standard transmission which I wasn't used to on the test drive. The only standard transmission I ever drove previously was a Trans Am with a 455 HO, which required a lot less rpms to get moving than that little 115 HP 4 cylinder. I got some pretty strange looks from the dealer during the ride.
Think about all the trips on and off truck trailers, ships, trains, and around parking lots to get to the final destination and it will be impossible to find one with zero miles.
Use your best judgement when picking out a new car, since your best judgement is really the only thing you can trust. If it doesn't feel right, move on.