The Salamence ex (103 / 107) card can be found in the Deoxys set.
Recently sold 2 times and based on those sales is worth around £52.36.
Currently, there are 8 open listings for this card on ebay.
This card sells in the range of £47.11 to £57.61, making it quite stable.
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.