The Glaceon V (175 / 203) card can be found in the Evolving Skies set.
Recently sold 8 times and based on those sales is worth around £43.00.
Currently, there are 10 open listings for this card on ebay.
This card sells in the range of £36.40 to £49.60, 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.