The Espeon ex (102 / 115) card can be found in the Unseen Forces set.
Recently sold 9 times and based on those sales is worth around £180.77.
Currently, there are 4 open listings for this card on ebay.
This card sells in the range of £135.61 to £225.93, making it highly volatile.
This Rare Holo Ex card was illustrated by Ryo Ueda.
The fact that it is a EX card makes it one of the more valuable cards.