OPTIMA Grupa d.o.o. plans to sell real estate owned by Rafinerija ulja Modrica, Rafinerija Nafte Bosanski Brod and Nestro Petrol a.d. Banja Luka. The real estate up for sale are 20 listed properties including office buildings, hotels, apartments and hospitality facilities located throughout Bosnia, Serbia and Montenegro, announcements published on the OPTIMA Grupa's website show. The offers for the sale of real estate are valid until July 24, 2015.