The Groudon (5 / 106) card can be found in the Emerald set.
Recently sold 3 times and based on those sales is worth around £15.97.
Currently, there are 3 open listings for this card on ebay.
This card sells in the range of £7.11 to £24.83, making it quite stable.
This Rare Holo card was illustrated by Kouki Saitou.