Like most Pokmon cards, the value of Air Balloon 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 (Sword & Shield)
And, quite often, we have to cut them for a different rare
These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen
Keep your cards in pristine condition to maintain their value over time
You need to play lands, so why not benefit from them
For the same cost as War Room, plus a card from your hand, you can look at as many cards on the top of your library as you have artifacts and put anyone into your hand , then put the rest on the bottom of your library