Buying a Koenigsegg Regera is impossible. All 80 build slots sold out in 2017, making the auction for this Regera completed in 2020 a once-in-a-lifetime opportunity to own one of the world's most advanced cars. Powered by a bespoke twin-turbo V8 mated to Koenigsegg's single-speed Direct Drive technology, the hybrid Regera makes a total of 1,500 horsepower and holds the world record in the 0-400-0 km run — 0-245-0 — in 22.87 seconds with a top speed of 251 MPH. Despite the performance, the Regera was designed to be a grand tourer, with a luxurious interior comfortable for long-distance trips. This Regera includes over $700,000 worth of options, including the Ghost Package with improved aerodynamics and the Environmental Package for improved power running on E85 fuel. One important note for potential buyers: The car will not be sold for use in California.