Cheapest priced copy (Wilds of Eldraine): $0.35 at Card Kingdom, near mint, their price list as of .
Tenacious Tomeseeker 
Creature — Human Knight · 3/2 · Uncommon · Wilds of Eldraine · #74
Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)
When this creature enters, if it was bargained, return target instant or sorcery card from your graveyard to your hand.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Wilds of Eldraine | 74 | Uncommon | $0.35 | $0.49 |
6 rulings from Wizards of the Coast
- 1 September 2023If you copy a bargained spell, the copy is also bargained. If a card or token enters the battlefield as a copy of a permanent that’s already on the battlefield, the new permanent isn’t bargained, even if the original was.
- 1 September 2023Adventurer cards aren't instant or sorcery cards while they're in your graveyard. You can't use Tenacious Tomeseeker's ability to return an adventurer card from your graveyard to your hand.
- 1 September 2023Some instant and sorcery spells require additional targets if they’re bargained. You ignore those targeting requirements if those spells aren’t bargained, and you can’t bargain those spells unless you can choose the appropriate targets. On the other hand, you can bargain a permanent spell even if you won’t be able to choose targets for an enters-the-battlefield ability of that permanent once the spell resolves.
- 1 September 2023Bargain represents an optional additional cost. A spell cast with that additional cost paid is “bargained.”
- 1 September 2023Bargain means “As an additional cost to cast this spell, you may sacrifice an artifact, enchantment, or token.”
- 1 September 2023You may sacrifice only one artifact, enchantment, or token to pay a spell’s bargain cost.