The auction will take place at the Greg Martin Auctions Gallery at 660 Third Street in San Francisco, and will be simulcast at Martin's New York City location, the Focus Room at 693 Fifth Avenue.

FORBES: Hot Shots

Buffett also invites some mild criticism from Harvard economist and former Mitt Romney economic advisor Greg Mankiw, who writes on his Wall Street Journal blog that Buffett has failed to come clean about his own tax avoidance strategies.

FORBES: Doesn't Anyone Disagree With Warren Buffett About Taxes?