The Groudon (102 / 101) card can be found in the Hidden Legends set.
Recently sold 1 times and based on those sales is worth around £40.64.
Currently, there are 10 open listings for this card on ebay.
This card sells in the range of £40.64 to £40.64, making it very stable.
This Rare Secret card was illustrated by Mitsuhiro Arita.