Billionaire Warren Buffett is auctioning a special lunch invitation for bidders on eBay. The auction will take place from June 23-30, and bidding will begin at $25,000.

Eight will be chosen to join Buffett for lunch at a mutually agreed upon restaurant in either Omaha or New York.

The proceeds of the auction will go to fund The Glide Foundation, which helps the poor and homeless throughout San Francisco.

This is the third year the chairman and chief executive of Berkshire Hathaway Inc. auctions a lunch for the foundation, of which Buffett's late wife, Susan Buffett, was a staunch supporter.