The Tornadus EX (108 / 108) card can be found in the Dark Explorers set.
Recently sold 3 times and based on those sales is worth around £8.06.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £0.01 to £16.91, 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.