Last month, comedian and well-known Porsche fanatic Jerry Seinfeld gave the classic car world a shock when Gooding & Company announced it would auction off a few rare cars from Seinfeld’s extensive Porsche collection. Now however, the number has swelled considerably—from three to 18 cars in total—and they’re not your average vintage Porsches.

The auction house’s collection now includes such rarities as a 1959 Porsche 718 RSK, 2000 Porsche Carrera GT Prototype, and a 1973 Porsche 917/30 Can-Am Spyder.

Auction estimates haven’t been announced for the entire collection, but for reference, the initial three cars of the collection were previously estimated to bring at least eight million dollars. This is shaping up to be one for the history books.

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All told, the full list includes the following, in chronological order:

1955 Porsche 550 Spyder

1957 Porsche 356 A Speedster

1958 Porsche 356 A 1500 GS/GT Carrera Speedster

1958 Porsche 597 Jagdwagen

1959 Porsche 718 RSK

1960 Volkswagen Beetle

1963 Porsche 356 B 2000 GS Carrera 2 Coupe

1964 Volkswagen Camper

1966 Porsche 911

1973 Porsche 917/30 Can-Am Spyder

1974 Porsche 911 Carrera 3.0 IROC RSR

1989 Porsche 911 Speedster

1990 Porsche 962C

1994 Porsche 964 Turbo 3.6 S Flachbau

1998 Porsche 993 3.8 Cup RSR

2000 Porsche Carrera GT Prototype

2011 Porsche 997 Speedster

2012 Porsche 997 GT3 4.0 Cup “Brumos Commemorative Edition”

It’s hard to pick a top seller from the list, however the rare 550 Spyders are heavily steeped in history and Seinfeld’s model is estimated to bring between five and six million dollars on its own.

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So why is Jerry Seinfeld selling? According to the comedian, it’s time for some other enthusiasts to enjoy part of the collection.

“I’ve loved being entrusted with their care, and I’m proud of the level to which we have brought each and every one of these wonderful machines,” noted Seinfeld in a statement. “The reason I wanted to bid these cars farewell in this way is really just to see the look of excitement on the faces of the next owners who I know will be out of their minds with joy that they are going to get to experience them.”

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The Jerry Seinfeld Collection is scheduled to cross the Gooding & Company auction block on March 11 in Amelia Island, Florida.

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