The Magnezone ex (226 / 198) card can be found in the Scarlet and Violet set.
Recently sold 14 times and based on those sales is worth around £5.50.
Currently, there are 9 open listings for this card on ebay.
This card sells in the range of £1.95 to £9.05, making it stable.
This Ultra Rare card was illustrated by PLANETA Tsuji.
The fact that it is a EX card makes it one of the more valuable cards.