It is the pricing model for car parts vs cars - say you take a car and order all the possible parts from the factory/dealer the costs is way more than the car i

It is the pricing model for car parts vs cars - say you take a car and order all the possible parts from the factory/dealer the costs is way more than the car itself by a factor of 3 I reckon. Keeping parts around and stocked is very expensive for the distributor - you have to handle multiple model years and various trim levels.