The Gyarados ex (225 / 198) card can be found in the Scarlet and Violet set.
Recently sold 10 times and based on those sales is worth around £18.50.
Currently, there are 11 open listings for this card on ebay.
This card sells in the range of £15.40 to £21.60, making it stable.
This Ultra Rare card was illustrated by 5ban Graphics.