The Gengar (48 / 165) card can be found in the Expedition Base Set set.
Recently sold 1 times and based on those sales is worth around £14.14.
Currently, there is 1 open listing for this card on ebay.
This card sells in the range of £14.14 to £14.14, making it very stable.
This Rare card was illustrated by Yukiko Baba.