National City ( NCC), crippled by bad real-estate loans, is in talks with a number of banks about a possible sale, the Wall Street Journal reports. Among the potential buyers for the regional bank are PNC Financial ( PNC) and Toronto-based Bank of Nova Scotia ( BNS). PNC declined to comment Wednesday, and Bank of Nova Scotia couldn't be reached. National City declined to comment, the Journal reports. Shares of National City closed Wednesday at $2.23.