You also have to remember ...
technically the car is a year old. with the new '04's coming out, the '03's have been there for a bit. You might be hard pressed to find one at this stage in the game with only 4 miles on it.
The good news though is...
that the milage wont effect your warranty...
Less than 200 miles should not be a big worry...
The car you are looking at is not a demo...or it would have over 1000miles on it....most dealers in AZ dont specify a specifuc car as a 'demo' when the vehicle is mass produced. they just drive the customer in whichever car they are interested in...