New Delhi, 29 May (NNS): The prices of big cardamom kainchicut remained firm at Rs 1540 per kg owing to the sluggish offtake even after the uptrend in the prices during the previous day. Recently, the prices have gone up by Rs 20 per kg. The average auction prices reported to be at Rs 1350/1600 per kg in the last auction which held during the previous day, due to this, the market sentiments may affect. There is no possibility of downfall in the spot big cardamom prices during the coming days