Lets not forget this tear-jerking scene too
I wouldnt mind snagging a few of each just in case
Like most Magic: The Gathering cards, the value of Arena Athlete depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Foundations Jumpstart)
The fact that in the original games, your Mons were explicitly trained not to intentionally inflict lethal injuries might have something to do with this: a Pikachu can control how much force it puts into a Thunder Shock, but a firearm has no stun setting
As a frame of reference, this card hovered around $1000-$3000 in 2019, but now has an average price of about $15,000
While some may view it as sacrilegious to run a Samurai at the head of such a deck, those who can look past Jin Sakais typing will find it an excellent new option for the archetype