What is the most expensive car ever?

Determining the single "most expensive car ever" is difficult because prices vary based on condition, customization, and the specific buyer. However, a strong contender for the title is the 1963 Ferrari 250 GTO. Several examples have sold for over $70 million, making them the most expensive cars ever sold at auction. There are other cars that may have sold privately for potentially higher sums, but those transactions lack the public record to confirm.