New Delhi, 26 November (NNS): The prices of big cardamom Kainchicut slipped by Rs 20 to Rs 1660 per kg owing to illegitimate downfall in the prices. Recently, the prices have gone down in the same ratio. The average auction price reported to be at Rs 1450/1750 per kg in the last auction which held on 20th November, due to this, the market sentiments may affect. There is no possibility of more downfall in the spot big cardamom prices during the coming one or two days.