1. 1962 Ferrari 250 GTO - $70 million:
 The 1962 Ferrari 250 GTO holds the record for the most expensive car ever sold. In 2018, a 250 GTO was sold in a private transaction for a staggering $70 million. Only 36 of these classic beauties were ever produced, making them extremely rare and highly sought after by collectors. The combination of its iconic design, racing pedigree, and limited production numbers contribute to its astronomical value.

 2. 1963 Ferrari 250 GTO - $52 million:
 Another 250 GTO, produced in 1963, was sold in a private sale for $52 million in 2013. This particular model, chassis number 5111GT, has a rich racing history, having participated in numerous competitions during the 1960s. Its unique provenance and racing heritage add to its allure and value.

 3. 1957 Ferrari 335 Sport Scaglietti - $35.7 million:
 The 1957 Ferrari 335 Sport Scaglietti set a record for the most expensive car ever sold at an auction in 2016. This classic racing car, powered by a V12 engine, was driven by legendary drivers like Mike Hawthorn and Stirling Moss. Its auction price reflects its historical significance, exceptional performance, and scarcity.

 4. 1964 Ferrari 275 GTB/C Speciale - $26.4 million:
 The 1964 Ferrari 275 GTB/C Speciale is one of the most unique and exclusive Ferraris ever produced. With only three examples made, this car was built specifically for racing and features a lightweight aluminum body. In 2014, it was sold at auction for $26.4 million, making it one of the most expensive Ferraris ever sold.

 5. 1956 Ferrari 290 MM - $28 million:
 The 1956 Ferrari 290 MM, designed by Scaglietti, is a rare racing car that was driven by renowned drivers such as Juan Manuel Fangio and Phil Hill. In 2015, it was sold at auction for $28 million, solidifying its status as one of the most valuable Ferraris ever.

 These are just a few examples of the most expensive Ferraris ever sold, showcasing the combination of rarity, racing heritage, and historical significance that contribute to their extraordinary values. It's worth noting that the prices mentioned are based on reported sales and may vary due to factors such as currency exchange rates and private negotiations.

 References:
 - "1962 Ferrari 250 GTO Becomes Most Expensive Car Ever Sold" - CNN Business
 - "The 10 Most Expensive Ferraris Ever Sold" - Money Inc.
 - "The 10 Most Expensive Ferraris Ever Sold at Auction" - Complex
 - "The 10 Most Expensive Cars Ever Sold at Auction" - Car and Driver