The Darkrai (3 / 100) card can be found in the Majestic Dawn set.
Recently sold 5 times and based on those sales is worth around £3.97.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £0.01 to £18.41, making it quite stable.
This Rare Holo card was illustrated by Mitsuhiro Arita.