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The energy and atmosphere at an automobile auction is unlike anything else. It's a room packed with the world's rarest and most desirable automobiles in existence, bustling with the world's wealthiest people as they engage in heated bidding wars, throwing theirs hands up in agreement to millions of dollars with their eyes on these prized collectibles. Not only are the prices outrageous, but the actual stories behind these one-of-a-kind machines are just as impressive. With the end of a summer that saw the two most expensive vehicles ever auctioned in the world, it's time for a recap. Watch the numbers climb with this list of the 15 Most Expensive Cars Ever Sold at Auctions.
15. 1959 Ferrari 250 LWB California Spider Competizione
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14. 1904 Rolls-Royce 10hp Two-Seater
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13. 1929 Mercedes-Benz 38/250 SSK
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12. 1937 Bugatti Type 57SC Atalante Coupe
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11. 1937 Mercedes-Benz 540 K Spezial Roadster
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10. 1965 Shelby Daytona Cobra Coupe
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9. 1962 Ferrari 330 TRI/LM Testarossa
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8. 1937 Mercedes-Benz 540 K Spezial Roadster
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7. 1931 Bugatti Royale Kellner Coupe
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6. 1931 Duesenberg Model J Long-Wheelbase Coupe
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5. 1961 Ferrari 250 GT SWB California Spyder
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4. 1957 Ferrari Testarossa
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3. 1957 Ferrari Testarossa Prototype
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2. 1967 Ferrari 275 GTB/4 NART Spider
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1954 Mercedes-Benz W196R "Silver Arrow"
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