The Dark Muk (16 / 109) card can be found in the Team Rocket Returns set.
Recently sold 1 times and based on those sales is worth around £7.00.
Currently, there are 4 open listings for this card on ebay.
This card sells in the range of £7.00 to £7.00, making it very stable.
This Rare card was illustrated by Mitsuhiro Arita.