Cars in the many millions are not that outrageous. Some things cannot or will not exist again and do have an inherent high value plus high demand and low production numbers.
Columbo engined Ferrari V-12's of the 1960's, such as the Lusso or SWB, or the four-cam GTB/4, the transverse mid-engine V-12 Lamborghini Miura SV of the 1970's, and, yes, especially the Pagani Huayra with its wonderful Jules Verne instrumentation and interior and its four aerodynamic flaps. Worth every cent.
However, I bought a perfectly good Canon FTb for $10. Win!