New Delhi, 22 December (NNS): The prices of black pepper markara improved by Rs 5 to Rs 720 per kg due to the limited buying from the stockists even after the weak prices. Recently, the prices have gone down by Rs 10 per kg. The arrivals remained stable at the same level of the previous day in Kochi and the prices improved by Rs 5 per kg. There is no possibility of more increment in the prices during the coming days.