The Gyarados (6 / 102) card can be found in the Base Shadowless set.
Recently sold 25 times and based on those sales is worth around £37.02.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £13.10 to £60.94, making it highly volatile.
This Rare Holo card was illustrated by Mitsuhiro Arita.