The Groudon ex (93 / 100) card can be found in the Crystal Guardians set.
Recently sold 10 times and based on those sales is worth around £20.05.
Currently, there are 9 open listings for this card on ebay.
This card sells in the range of £0.78 to £39.32, making it quite volatile.
This Rare Holo Ex card was illustrated by Takabon.
The fact that it is a EX card makes it one of the more valuable cards.