A stack of cash alone will not get you an Enzo -- Ferrari has traditionally made potential buyers apply to buy one of their limited-edition cars, placing various restrictions on what may and may not be done with the car. They enforce these restrictions by threatening to withdraw perks like factory tours and the chance to buy future Ferraris -- a serious threat to the exotic car collectors of the world.
Previous Ferraris were even harder to get than the Enzo. For example, the Ferrari F50 wasn't sold, it was only leased. Ferrari could yank the lease at any time, and one of the stranger restrictions was that journalists were not allowed to use the car for performance testing (Car and Driver, Aug. 2003). The Enzo is far easier to get into by comparison. All approved Enzo buyers had the option of traveling to Italy to have the seat and pedals custom fitted.
Source:
http://auto.howstuffworks.com/enzo4.htm
How and why? Can someone explain?