The Aggron ex (95 / 100) card can be found in the Sandstorm set.
Recently sold 12 times and based on those sales is worth around £18.96.
Currently, there are 8 open listings for this card on ebay.
This card sells in the range of £8.26 to £29.66, making it quite volatile.
This Rare Holo Ex card was illustrated by Hikaru Koike.
The fact that it is a EX card makes it one of the more valuable cards.