New Delhi, 06 November (NNS): The prices of big cardamom reduced by Rs 30 to Rs 970 per kg due to the weak buying even after the sluggish prices. Before this, the prices have gone down in the same ratio. The average auction price slipped to Rs 875/1175 per kg in ht last auction which held on November 2. It is expected that the other crop will likely to arrive in the near future. There is no possibility of uptrend in the prices during the near future.