The Muk (16 / 110) card can be found in the Legendary Collection set.
Recently sold 4 times and based on those sales is worth around £20.25.
Currently, there are 4 open listings for this card on ebay.
This card sells in the range of £10.78 to £29.72, making it quite stable.
This Rare Holo card was illustrated by Mitsuhiro Arita.