New Delhi, 20 October (NNS): Here, the sale of black pepper reported to be sluggish. As a result, black pepper markara held stable at Rs 655 per kg. Recently, the prices have improved by Rs 10 per kg. The trading activities reported to be sluggish in Kochi because of the direct deals by the farmers from the traders. The spot black pepper prices will likely to remain stable at the same level during the coming days.