New Delhi, 28 May (NNS): The import prices of big cardamom reported to be high from Bhutan and Nepal because here, the speculators have sold the stock at Rs 1440/1450 per kg. The traders are purchasing the stock illegally, due to this reason, here also, its prices may gain by Rs 30/40 per kg in the current week and the prices may rose by Rs 50 per kg in June during the coming days.