The Swampert ex (98 / 100) card can be found in the Crystal Guardians set.
Recently sold 5 times and based on those sales is worth around £34.09.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £10.89 to £57.29, making it highly volatile.
This Rare Holo Ex card was illustrated by Ryo Ueda.
The fact that it is a EX card makes it one of the more valuable cards.