New Delhi, 06 March (NNS): The prices of big cardamom kainchicut remained firm at Rs 1640 per kg owing to the sluggish offtake even after the downfall in the prices. Recently, the prices have gone down by Rs 10 per kg. The active auction price reported to be around 1425/1700 per kg in the last auction which held on 26th February, due to this, the market sentiments may affect. There is no more downfall in the prices during the coming one or two days.