The Gardevoir ex (93 / 101) card can be found in the Dragon Frontiers set.
Recently sold 9 times and based on those sales is worth around £15.30.
Currently, there are 24 open listings for this card on ebay.
This card sells in the range of £0.01 to £34.72, making it quite volatile.
This Rare Holo Ex card was illustrated by Masahiko Ishii.