The Leafeon (17 / 90) card can be found in the Hs Undaunted set.
Recently sold 2 times and based on those sales is worth around £5.24.
Currently, there is 1 open listing for this card on ebay.
This card sells in the range of £4.73 to £5.75, making it very stable.
This Rare card was illustrated by Noriko Hotta.