Signed portrait of Warren Buffett up for auction, bids cross $30,000

Billionaire Warren Buffett is auctioning off a signed portrait of himself to raise money for charity. The portrait of Buffett features a grid of letters over the picture that spell his famous quotes. While the bidding has already topped $30,000, the proceeds from the art auction will go to Girls Inc. of Omaha for young women in Buffett's hometown.