New Delhi, 17 August (NNS): Here, the prices of black pepper markara remained stable at Rs 670 per kg owing to the sluggish sale at the higher level. Recently, the prices have gone up by Rs 10 per kg. The arrivals reported to be negligible in Kochi and the prices held stable at the level of the previous day. The market sentiments may because of the onam festival. The spot black pepper prices may likely to remain strong during the coming days.