The Rayquaza ex (97 / 97) card can be found in the Dragon set.
Recently sold 11 times and based on those sales is worth around £54.16.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £0.01 to £111.35, making it highly volatile.
This Rare Holo Ex card was illustrated by Hikaru Koike.
The fact that it is a EX card makes it one of the more valuable cards.