The Mew V (251 / 264) card can be found in the Fusion Strike set.
Recently sold 7 times and based on those sales is worth around £36.00.
Currently, there are 7 open listings for this card on ebay.
This card sells in the range of £32.10 to £39.90, making it stable.
This Rare Ultra card was illustrated by Naoki Saito.
The fact that it is a V card makes it one of the more valuable cards.