The Dark Wartortle (39 / 110) card can be found in the Legendary Collection set.
Recently sold 4 times and based on those sales is worth around £43.54.
Currently, there are 6 open listings for this card on ebay.
This card sells in the range of £29.86 to £57.22, making it quite volatile.
This Uncommon card was illustrated by Kagemaru Himeno.