One-off sales can be caused by flukes of circumstance or particularly urgent buyers, so valuing a Mewtwo card is more appropriately done by looking at their average resale value on sites like TCGplayer and PriceCharting (all listed prices are from the time of writing)
The PSA 9 versions of the card sell for an average of $100-300, making this a valuable card but not a huge deal
Luckily, Ultra Rare cards are often pretty affordable on the singles market
Pokmon fans who purchase a Happy Meal through mid-September 2022 will receive everything they need to stage a Match Battle with friends
Explorers of the Deep - Lost Caverns of Ixalan This Simic (Blue/Green) deck is helmed by Hakbal of the Surging Soul, and uses the Explore mechanic to great effect, either ramping your lands, netting you creatures, or getting card draw
Karumonix, the Rat King makes it much more threatening by giving those rats toxic 1