Frugal Billionaires

Forbes posts a slideshow and profiles of the world's frugal billionaires, including Warren Buffett (shown in the picture) and Ingvar Kamprad, founder of IKEA:

Ikea's pennywise founder is famous for being cheap. He flies coach, drives a 1993 Volvo and often dines at lower-tier restaurants. He also reportedly furnishes his home with Ikea's affordable merchandise. Kamprad was recently quoted as saying that the only luxuries he splurges on are the occasional upscale cravat and Swedish fish roe.