The Lugia ex (105 / 115) card can be found in the Unseen Forces set.
Recently sold 4 times and based on those sales is worth around £205.30.
Currently, there are 8 open listings for this card on ebay.
This card sells in the range of £121.58 to £289.02, making it highly volatile.
This Rare Holo Ex card was illustrated by Hikaru Koike.
The fact that it is a EX card makes it one of the more valuable cards.