With 2023 drawing to a close, it's time to take a closer look at some of the most expensive machinery that has gone under the hammer over the past 12 months. As you'd expect, Prancing Horse cars dominate proceedings – Ferraris are both the cheapest and the most expensive cars here. Only the best machines from other manufacturers nose their way onto the list, namely Lewis Hamilton's Mercedes F1 car and another Merc race car in the bewinged shape of a CLK GTR Roadster. A list of the most expensive auction cars can't exist without Bugatti claiming a spot. The Chiron Profilée you'll read about here is the most expensive new car ever sold at auction. Meanwhile, a rare Jaguar XKSS does its bit to represent British high-end metal. Here's our guide to the most expensive cars sold at auction in 2023.