3) Palkia ex Palkia ex is a phenomenal card that can deal early damage with its single-Water-energy move, Slash
This card features a healthy range from $30 to about $100, as cards in lightly played (LP) can typically sink to the $70 range while anything worse than that usually will stay around $50 or lower
1 Jack The Top End That Does Everything A lot can be said about Jack
For complete lists of the cards available in each of the sets above, take a look at Bulbapedia
Being played mostly in UW Control and some sideboards, the card never really picked up that much of an archetype enabler, unlike in Legacy in which its the go-to card in combination with Ancient Tomb against Brainstorm and Lions Eye Diamond strategies
In addition, of course, there is always a chance that you will draw a rare card from one of the booster packs