The Umbreon V (189 / 203) card can be found in the Evolving Skies set.
Recently sold 6 times and based on those sales is worth around £72.50.
Currently, there are 53 open listings for this card on ebay.
This card sells in the range of £63.11 to £81.89, making it quite stable.
This is a Rare Ultra card.
The fact that it is a V card makes it one of the more valuable cards.