The Gyarados Star (102 / 110) card can be found in the Holon Phantoms set.
Recently sold 5 times and based on those sales is worth around £185.52.
Currently, there are 3 open listings for this card on ebay.
This card sells in the range of £41.91 to £329.13, making it highly volatile.
This Rare Holo Star card was illustrated by Masakazu Fukuda.