Every car I have ever bought was purchased as it came when it was pulled off the truck (aside from mandatory things like doing the PDI and installing a block heater -- it's an Alberta thing
).
I would laugh at any sales person who tried to sell me any sort of "dealer package," etc. I would call every other dealership in the city and find one that would sell me one the way the car came from the factory. Failing that I would start calling further away. Someone will do it.
If you want to throw in nitrogen for free, so be it, or even cheap, but beyond that I don't want ugly pinstriping, or undercoating, or poorly installed tint, or any other crap that didn't come on the car.
Jeff