SARAJEVO (Bosnia and Herzegovina), December 2 (SeeNews) - The Investment-Development Bank (IRBRS) of Bosnia's Serb Republic said it is selling 5,000,000 preferred shares representing a 20.98% stake in lender Nasa Banka [BANJ:PIBB-P-A] for 4.05 million marka ($2.5 million/2.1 million euro), following an unsuccessful sale attempt in August.