The Metagross (11 / 113) card can be found in the Delta Species set.
Recently sold 2 times and based on those sales is worth around £10.00.
Currently, there are 10 open listings for this card on ebay.
This card sells in the range of £5.00 to £15.00, making it quite stable.
This Rare Holo card was illustrated by Masakazu Fukuda.