New Delhi, 17 June (NNS): The prices of black pepper markara gained by Rs 30 to Rs 735 per kg owing to the strong buying from the stockists even after the higher level. Before this, the prices have gone up by Rs 20 per kg. There is a holiday in Kochi on the occasion of Bakr Eid, but before this, both the arrivals and the prices held stable at the same level of the previous day. The market sentiments may affect because of the higher prices in Vietnam. The spot black pepper prices may show heavy uptrend during the coming days.