See the super-rare 30 most-expensive cars up for auction at Monterey including vintage Ferraris, Porsches, and Aston Martins

This is the oldest car to don the Porsche script badge and was driven by Porsche founder Ferdinand Porsche and his son Ferry, according to RM Sotheby's. It is the only surviving 1939 Type 64s out of the three that were built, but is not technically a Porsche as the company was not started until 1948.

Ferrari built 106 California spiders, according to CNBC. 50 of them, including this one offered by Gooding, have the long-wheelbase (LWB).

Ferrari built 56 250 GT California Spiders, according to RM Sotheby's. It has had only four owners in the past 50 years.

This car is the second of 10 surviving "Works" cars, according to RM Sotheby's. Previous owners include famed racers Peter Collins and Roy Salvadori.

This Ferrari is one of five surviving Scuderia Ferrari Sports Prototypes constructed for the 1961 to 1962 racing season, according to RM Sotheby's.

This car is "one of the finest 250 SWBs extant," according to RM Sotheby's.

This is the first of five GT40 Roadsters Ford built, according to RM Sotheby's.

Ferrari built five Series I Cabriolet with the factory side vents, according to Gooding & Company.

This is one of the most significant post-war Alfa Romeos still in existence, according to Gooding & Company.

Niki Lauda drove this Ferrari during his first Formula One World Championship in 1975, according to Gooding & Company and Forbes.

This example is the only one of four RS 60s that will likely be sold, RM Sotheby's says.

The 1955 Ferrari 375 MM Coupe Speciale by Ghia was a one-off design, according to RM Sotheby's.

This was the only 1958 Ferrari 250 GT Tour de France Berlinetta that was delivered to Sweden, according to Gooding & Company.

Sean Connery's "James Bond" drove this car during the "Goldfinger" and "Thunderball" films, according to RM Sotheby's. This example was only used in promotion work, however.

Only 30 out of the 75 1961 Aston Martin DB5 GTs were built in left-hand-drive like this example, according to Gooding & Company.

Ferrari built 12 examples of the 225 Sport Spider with a body made by Vignale, according to RM Sotheby's.

This is the only 275 GTB finished in "Blue Notte" (night blue) over red, according to Gooding & Company.

Maserati built 52 units, according to RM Sotheby's. This is the 25th one.

This specific car has never been sold publicly, according to Bonhams, and is only one of 30 ever made.

Aston Martin built 47 DB4GT units with right-hand-drive including this example, according to RM Sotheby's.

This car is one of the most original Pre-WWI race cars still in existence, according to Gooding & Company.

Ferrari originally built this model to celebrate the company's 50th anniversary, according to RM Sotheby's. This unit is the 16th of 55 Ferrari F50s delivered to the US.

Ferrari built 17 400 Superamerica SWB Aerodinamicos, according to RM Sotheby's. This is the fifth one.

This is one of four triple-carburetor, long-nose, torque-tube, aluminum-bodied Ferrari 275 GTB Alloys by Scaglietti built, according to RM Sotheby's.

Approximately 350 1997 Ferrari F50s were built, according to Gooding & Company. The car has less than 3,000 miles at the time of cataloging.

The car has clocked approximately 1,000 miles and is one of 120 2014 Ferrari LaFerraris sent to the US, according to Gooding & Company. A total of 500 were shipped worldwide.

Only 14 Series I Short-Wheelbase Aerodinamico Coupes were built, according to Gooding & Company. The coachwork was by Pininfarina.

This Blower 4½ is one of 50 built by Bentley, according to Bonhams.

This car was a multiple-award winner at the 2015 Pebble Beach Concours d'Elegance, according to Gooding & Company.