The Rocket's Snorlax ex (104 / 109) card can be found in the Team Rocket Returns set.
Recently sold 3 times and based on those sales is worth around £526.97.
Currently, there is 1 open listing for this card on ebay.
This card sells in the range of £353.23 to £700.71, making it highly volatile.
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.