The Entei & Raikou Legend (90 / 95) card can be found in the Hs Unleashed set.
Recently sold 5 times and based on those sales is worth around £21.70.
Currently, there are 7 open listings for this card on ebay.
This card sells in the range of £13.97 to £29.43, making it quite stable.
This Legend card was illustrated by Shinji Higuchi + Sachiko Eba.