New Delhi, 22 December (NNS): The prices of big cardamom reduced by Rs 10 to Rs 1670 per kg due to the weak buying from the stockists even after the higher prices. Recently, the prices have gone up by Rs 20 per kg. Its average auction price gained to Rs 1475/1800 per kg in the last auction which held on 18th December. The market sentiments may affect because of the sluggish support of sale. There is no possibility of long uptrend in the spot big cardamom prices during the near future.