The Gengar (20 / 62) card can be found in the Fossil 1St Edition set.
Recently sold 6 times and based on those sales is worth around £16.00.
Currently, there are 25 open listings for this card on ebay.
This card sells in the range of £11.92 to £20.08, making it stable.
This Rare card was illustrated by Keiji Kinebuchi.