Newest-new car I owned had 15 miles on the odometer when I signed the paperwork. I put on 9 of those miles during a test drive. It wasn't a fancy or special-ordered car either. Just a cheap Honda. But it was such an unpopular configuration that it was shoved in the back of the showroom since they figured it would never sell. I later found out that the dealer lost $300 selling me the car.
Newest-old car I owned had about 100 miles on the odometer. The dealer that I bought it from stores most of their cars on a remote lot. I wanted a specific car that just so happened to be on the dealership lot. I bought a 4-banger commuter car.
Salespeople accompanying potential customers typically hop in such cars to go from the dealership lot to the remote lot. Cars ship with 2-3 gallons of gas, which goes further if your car gets 30mpg than 12mpg. Plus there's the typical test drives for being an entry-level, stock (dealer-ordered) vehicle.
It is common to see up to 200 on new cars. Most of those miles coming after the dealer gets it for test drives. In a normal world we could get a discount on those cars but not today.
I wouldn’t buy a new car with more than 20 miles. Unless it was used as a tester. I think you can tell on the sticker or some documentation if it was taken for a test drive at the factory. Some one has mentioned that their Maverick had 20 some miles due to a random selection for test drive at the factory.
Wondering why mine had so many ? Salesman said he saw it come off the trailer and was not driven by anyone. Something about them driving the Hybrids more to test ? It seems that's not the case. Just hope there was no joyriding and more miles were put on it for some other reason.