The Latias & Latios GX (190 / 181) card can be found in the Team Up set.
Recently sold 21 times and based on those sales is worth around £29.28.
Currently, there are 7 open listings for this card on ebay.
This card sells in the range of £19.30 to £39.26, making it quite stable.
This Rare Rainbow card was illustrated by 5ban Graphics.
The fact that it is a GX card makes it one of the more valuable cards.