RM Sotheby’s lists the 1958 Ferrari 250 GT Cabriolet Series I with a $4–5 million presale estimate.

It’s chassis 18 of just 40 Series I Pinin Farina cabriolets.

Matching numbers, Ferrari Classiche certification and preservation-class concours history.

The most talked-about Ferrari at Monterey Car Week this year is not a modern hypercar. It is a 1958 Ferrari 250 GT Cabriolet Series I by Pinin Farina, a delicately styled open-top grand tourer carrying a headline presale estimate of $4–5 million at RM Sotheby’s.

That number raises two questions for collectors: what sets this 250 GT Cabriolet apart, and is $5 million wild money or in line with today’s Ferrari market. Misjudge either and you misread everything from its provenance to how blue-chip auction houses price rare Maranello cars.