New Delhi, 16 June (NNS): Dry ginger prices remained firm at Rs 30500 per quintal owing to the sluggish buying. Recently, the prices have gone up by Rs 500 per quintal. Both the arrivals and the prices held stable at the same level of the previous day in Kochi. The market sentiments may affect owing to the higher prices of ginger as comparatively. The spot pistachio prices will not likely to decrease during the coming one or two days.