The Metagross (11 / 113) card can be found in the Delta Species set.
Recently sold 3 times and based on those sales is worth around £34.52.
Currently, there are 7 open listings for this card on ebay.
This card sells in the range of £25.11 to £43.93, making it quite stable.
This Rare Holo card was illustrated by Masakazu Fukuda.