Cheapest priced copy (Commander 2016): $0.49 at Card Kingdom, near mint, their price list as of .
Realm Seekers 
Creature — Elf Scout · 0/0 · Rare · Foundations Jumpstart · #705
This creature enters with X +1/+1 counters on it, where X is the total number of cards in all players' hands.
{2}{G}, Remove a +1/+1 counter from this creature: Search your library for a land card, reveal it, put it into your hand, then shuffle.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $0.49 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 162 | Rare | $0.49 | — |
| Conspiracy | 38 | Rare | $0.59 | $3.49Out of stock |
| Foundations Jumpstart | 705 | Rare | $0.49 | — |
| Tales of Middle-earth Commander | 258 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 29 May 2014If Realm Seekers enters the battlefield directly from a player's hand without being cast, it counts itself when determining the value of X.
- 29 May 2014The value of X is determined as Realm Seekers enters the battlefield. Players can cast spells and activate abilities while Realm Seekers is on the stack to remove cards from their hands if they wish, and this will result in fewer counters being placed on Realm Seekers as it enters the battlefield.