The Darkrai EX (107 / 108) card can be found in the Dark Explorers set.
Recently sold 2 times and based on those sales is worth around £79.24.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £64.81 to £93.67, making it quite volatile.
This Rare Ultra card was illustrated by 5ban Graphics.
The fact that it is a EX card makes it one of the more valuable cards.