The Groudon EX (150 / 160) card can be found in the Primal Clash set.
Recently sold 10 times and based on those sales is worth around £14.19.
Currently, there are 10 open listings for this card on ebay.
This card sells in the range of £7.52 to £20.86, making it quite stable.
This Rare Ultra card was illustrated by 5ban Graphics.
The fact that it is a EX card makes it one of the more valuable cards.