At present, there are many options for each car that are not available on all models. For example 1) Fusion: if I want all wheel drive, I cannot get it with the S or SE models, but have to buy the Titanium model. 2) Escape: if I want the hands-free liftgate, I cannot get it with the S or SE models, but have to buy the SEL or Titanium models. Thus, in order to get something I want, I have to spend a lot of money on stuff that I do NOT want. If you want to increase you sales, allow customers to buy every option for every model then give a "package discount" for buying a model in which a set of options are included.