The Entei EX (103 / 108) card can be found in the Dark Explorers set.
Recently sold 1 times and based on those sales is worth around £21.47.
Currently, there are 7 open listings for this card on ebay.
This card sells in the range of £21.47 to £21.47, making it very 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.