1. 1936 Mercedes-Benz 540K Special Roadster sold for $11,770,000 (Gooding)

2. 1960 Ferrari 250 GT California LWB Competizione Spyder sold for $11,275,000 (Gooding)

3. 1968 Ford GT40 Gulf/Mirage Coupe sold for $11,000,000 (RM)

4. 1957 Ferrari 250 California GT SWB Spyder sold for $8,580,000 (RM)

5. 1955 Ferrari 410 S Berlinetta sold for $8,250,000 (RM)

6. 1956 Ferrari 250 GT TdF Coupe sold for $6,710,000 (RM)

7. 1957 Ferrari 250 GT California LWB Prototype Spyder sold for $6,600,000 (Gooding)

8. 1955 Ferrari 857 Sport sold for $6,270,000 (Gooding)

9. 1928 Bentley Le Mans 4 1/2 Liter sold for $6,050,000 (Gooding)

10. 1972 Porsche 917/10 Spyder sold for $5,830,000 (Mecum)

-By CNBC's Robert FrankFollow Robert Frank on Twitter: @robtfrank

Would You Take Financial Advice From an Algorithm?

Brokers-Dealers May See Fiduciary Standard Rules Soon

Financial Advisor Fees: Understand Services, Costs

Even Skilled Investors Can Use a Financial Advisor

Know the Ropes When Shopping for a Financial Pro

More Money Talks: Advice and the Adviser