The founder of IKEA said he drove 15-year-old Volvo and always flew economy class, according to a 2006 Reuters article.

His frugal ways extend to his home in Switzerland, which is reportedly decorated mostly with inexpensive IKEA furniture, as well as a few family heirlooms.

According to The Daily Mail, Kamprad and his wife are often seen eating in cheap restaurants and haggling over prices at the market.

Note: Some Swedes will tell you that Kamprad is not as frugal as he would have you believe.

Tim Cook’s Net worth: unknown, but he made $378 million in 2011

He may not technically be a billionaire, but Apple CEO Tim Cook is compensated handsomely.

Even so, he chooses to live a modest lifestyle. Cook lives in a modest, 2,400-square-foot condo in Palo Alto, which he bought for $1.9 million in 2010.

He’s quoted as saying in the book Inside Apple: “I like to be reminded of where I came from, and putting myself in modest surroundings helps me do that. Money is not a motivator for me.”

Chuck Feeney’s Net worth: currently $2 million (he’s given away billions)

A Depression-era veteran with a strict personal motto: “I set out to work hard, not get rich.”

The co-founder of Duty Free Shoppers has donated more than $4 billion to disadvantaged children and public health initiatives, all while going to great lengths to remain an anonymous donor.

“He has no ego . . . He always chooses the second-cheapest wine from the wine list,” according to his biographer, former Irish Times journalist Conor O’Clery. “When we traveled together he was always dressed like a down-at-heel American tourist.”

David Cheriton, the Stanford professor who has an estimated net worth of $1.3 billion from Google shares, hates the idea of living like a billionaire.

“I’m actually quite offended by that sort of thing,” he told the Edmonton Journal in a 2006 interview. “These people who build houses with 13 bathrooms and so on, there’s something wrong with them.”

Cheriton called himself “spoiled” for taking a windsurfing vacation in Hawaii, and in a recent Forbes profile said that his biggest recent splurge was his 2012 Honda Odyssey.

Tony Hsieh, CEO of Zappos

Karl Albrecht’s Net worth: $25.4 billion

Aldi is to Europe what Walmart is to the US. Albrecht founded the company with his late brother Theo, and together the two made billions building the notoriously no-frills chain.

Raised by a shopkeeper mom and a miner father, they remained true to the vision of frugality that drove both their stores and their lives. When Theo was kidnapped for 17 days in 1971, his brother negotiated a bargain ransom of  $4 million — which he then wrote off as a business expense.

Christy Walton’s Net worth: $27.9 billion

Walton is the widow of John T. Walton, one of the sons of Walmart founder Sam Walton.

Despite their wealth, Walton wanted a normal upbringing for her son, so she raised him in an 1896 Victorian home in National City, Calif., outside of San Diego.

After her husband died in a plane crash, Walton donated the home to the International Community Foundation – Center for Cross-Border Philanthropy.

Mark Zuckerberg’s Net worth: $9.4 billion

As the mastermind behind Facebook, Mark Zuckerberg is a billionaire many times over. But the 28-year-old leads a surprisingly low-key lifestyle.

He recently upgraded to a $7 million house in Palo Alto, but The Los Angeles Times called the home “still well below his means.”

Zuckerberg reportedly drives an Acura “because it’s safe and not ostentatious,” and famously wears the same gray t-shirt and hoodie to work every day.

His wedding to longtime girlfriend Priscilla Chan took place in his backyard, and the pair was seen digging in at a McDonald’s on their Italian honeymoon.

David Green’s Net worth: $4.5 billion

While he could easily afford a Gulfstream of his own, Green, founder of arts and crafts retail chain Hobby Lobby, prefers to fly coach.

Instead of spending his billions on himself and his family, Green has famously become the largest individual donor to evangelical causes in America. He’s given upwards of $500 million in charitable contributions over his lifetime, according to Forbes.

Warren Buffett, chairman and CEO of Berkshire Hathaway

Alexander Lebedev, Russian businessman

Carlos Slim Helú, chairman and CEO of Telmex

Amancio Ortega, founder of Zara