New Delhi, 20 September (NNS): The prices of copra in bags reduced by Rs 500 to Rs 13500 per quintal owing to the weak offtake at the sluggish prices. Recently, the prices have gone down in the same ratio. The market sentiments may affect due to the increased supply from the producing areas and unfavourable weather conditions. There is no possibility of long uptrend in the prices during the coming days.