The Rocket's Hitmonchan ex (98 / 109) card can be found in the Team Rocket Returns set.
Recently sold 1 times and based on those sales is worth around £65.36.
Currently, there are 5 open listings for this card on ebay.
This card sells in the range of £65.36 to £65.36, making it very stable.
This Rare Holo Ex card was illustrated by Mitsuhiro Arita.
The fact that it is a EX card makes it one of the more valuable cards.