The Mewtwo VSTAR (221 / 172) card can be found in the Vstar Universe Jp set.
Recently sold 17 times and based on those sales is worth around £33.27.
Currently, there are 10 open listings for this card on ebay.
This card sells in the range of £26.98 to £39.56, making it quite stable.
This Special Art Rare card was illustrated by GOSSAN.