1962 Ferrari 250 GTO: Sold for a record-breaking $48.4 million in 2018. Only 36 were ever made.
  
1957 Ferrari 335 S Spider: Sold for $35.7 million in 2016. It was one of only four ever built.
  
1964 Ferrari 275 GTB/C Speciale: Sold for $26.4 million in 2014. It is a rare racing version of the iconic 275 GTB.
  
1954 Mercedes-Benz W196: Sold for $29.6 million in 2013. It is a Formula One race car driven by Juan Manuel Fangio.
  
1956 Aston Martin DBR1: Sold for $22.5 million in 2017. It is a legendary racing car that won the 1959 24 Hours of Le Mans.
These are just a few examples of the most expensive cars ever sold. The prices mentioned are based on public auction records, and they may vary depending on the source and the specific conditions of the sale. References and further information can be found on reputable automotive websites and auction house records.