BuffettWarren Buffett is in talks to buy GMAC's mortgage lender Residential Capital, the New York Post reports. Teamed up with Appaloosa Management and Avenue Capital, Buffett has large debt positions in the gut-shot company, according to the Post. In September, Buffett's Berkshire Hathaway and Leucadia National agreed to buy Capmark Financial Group's mortgage loan and servicing business for up to $490 million.