Billionaires build their fortunes on wise financial decisions. Once those fortunes are made, though, they can afford to splurge on things they don't really need — like luxury cars.
For instance, Microsoft co-founder and world's richest person Bill Gates recently bought himself a Porsche 911 supercar. Virgin founder Sir Richard Branson, likewise, famously drives his amphibious Gibbs Aquada around the U.K. But there are other billionaires who never let go of the thrifty habits that contributed to their success.
Here are five remarkably modest vehicles owned by five of the world's wealthiest people: