* Customization: Many ultra-luxury cars are highly customizable. Options like bespoke interiors, unique paint jobs, and specialized features can dramatically increase the price beyond the base model.
* Rarity and Collectibility: One-off creations and extremely limited-production vehicles can fetch exorbitant prices at auction, far exceeding their original MSRP.
* Condition: The condition of a classic or vintage car significantly impacts its value. A perfectly preserved, pristine example will be far more expensive than a less-well-maintained one.
While certain hypercars regularly top the lists of most expensive *new* cars (like the Bugatti Chiron, Rolls-Royce Boat Tail, etc.), the true "most expensive car" title often goes to a unique, one-off, or exceptionally rare classic sold at auction for tens or even hundreds of millions of dollars. The price fluctuates wildly based on the factors above. Therefore, there isn't a fixed number.
