The Sultan of Brunei

Size of Collection: 5,000*
Est. Total Value: $5 billion*

When former President Barack Obama visited the Sultan of Brunei, he joked that the royal should go shopping in America to help boost the economy. President Obama had a point, as the Sultan is worth $20 billion, thanks to his rule over the oil-rich country of Brunei.

The Sultan has a car collection of not hundreds, but thousands of vehicles. His collection numbers 5,000, and all of his cars are housed in a palatial garage. The Sultan owns 300 Ferraris, 11 McLaren F1s, 600 Rolls Royces, 20 Koenigseggs, and six Porches, among thousands of others. The car collection is estimated to be worth $5 billion, making it the most expensive on this list.