HomeServices of America, the real estate firm owned by Warren Buffett, has agreed to pay $250 million to settle a nationwide antitrust lawsuit. The settlement could potentially transform the way real estate agents are compensated. What Happened: According to a report by the New York Post, HomeServices of America, a subsidiary of Berkshire Hathaway (NYSE: BRK-A), was the last defendant in a case against the National Association of Realtors (NAR) and four brokerages. After a jury verdict in Kansas City, Missouri, in October, the settlement aims to preempt a potentially larger payout. The verdict…