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)
It's such a powerful way to end the threat from an aggressive deck, leaving behind a relevant body to attack back with on the next turn
Thats only if your commander is a 0/0, though
It's more money upfront in some cases, but with Mega Evolution enhanced booster boxes going for around $260 right now, you could get some of the top chase cards instead
The other unique improvement that I wasnt expecting is the new, bigger damage counter dice that it comes with
It also predates the unlimited print run, and differs by having a shadowless border around the character box