The Articuno (48 / 53) card can be found in the Wizards Black Star Promos set.
Recently sold 4 times and based on those sales is worth around £22.35.
Currently, there are 10 open listings for this card on ebay.
This card sells in the range of £21.07 to £23.63, making it very stable.
This Promo card was illustrated by Atsuko Nishida.