New Delhi, 25 August (NNS): The prices of big cardamom kainchicut remained firm at Rs 1540 per kg owing to the sluggish buying from the stockists even after the feeble prices. Recently, the prices have gone down by Rs 20/30 per kg. Its average auction price declined to Rs 1250/1712.50 per kg in the last auction which held on 21st August, due to this, the market sentiments may affect. There is no possibility of long uptrend in the spot big cardamom prices during the coming days.