New Delhi, 11 August (NNS): The prices of big cardamom reduced by Rs 25 to Rs 1085 per kg due to the weak sale even after the sluggish prices. Along with this, its prices slipped by Rs 40 per quintal.The average auction price reported to be increase at Rs 800/1287 per kg in the last auction which held during the last day. Due to this, the market sentiments may affect. There is no possibility of temporary downtrend in the spot big cardamom prices during the coming days.