New Delhi, 29 February (NNS): The prices of coriander badami reduced by Rs 100 to Rs 8200 per quintal due to the sluggish sale at the higher level. Recently, the prices have gone up by Rs 200 per quintal. There were about 8000/9000 bags of coriander reported to arrive in the Ramganj mandi and the prices held firm at the level of the previous day. The spot coriander prices will not likely to improve during the coming one or two days.