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Squawk Box - Season 20
Warren Buffett, chairman and CEO of Berkshire Hathaway in an interview on May 4, 2015.
CNBC—NBCU Photo Bank via Getty Images

Warren Buffett, the 84-year-old head of Berkshire Hathaway, may be a billionaire. But he doesn't spend like one.

He famously still lives in the Omaha, Nebraska, house he bought in 1958 for $31,500.

And, according to a new story by Market Watch, he's a long-time patron of Omaha barber Stan Docekal—who charges him $18 (tip not included) for a hair trimming every two or three weeks.

Docekal, who has cut Buffett's hair for about 23 years, is also in his early 80s. Desperate to pick up tidbits about the Oracle of Omaha, journalists have interviewed the barber many times over the years. Apparently Buffett's activities during haircuts include listening to oldies music, watching CNBC, and reading his mail, a newspaper, or an annual report.

Is $18 a good deal?

Technically it's higher than the national average of about $14 for a men's cut, according to a recent study. But it's pretty darn cheap for the third richest person in the world.

Read more: This Is How Much It Costs to Live Next Door to Warren Buffett