New Delhi, 20 November (NNS): The prices of dry ginger remain firm at Rs 29,500 per quintal due to the sluggish sale even after the increment in the prices during the previous days. Recently, the prices have gone up by Rs 500 per quintal. Both the arrivals and the prices held at the same level of the previous day in Kochi. The market sentiments may affect as the prices of ginger have been ruling at the higher level. The spot dry ginger prices will likely to remain strong during the near future.