The Raikou EX (105 / 108) card can be found in the Dark Explorers set.
Recently sold 6 times and based on those sales is worth around £36.71.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £26.76 to £46.66, making it quite stable.
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.