Cheapest priced copy (Betrayers of Kamigawa): $0.39 at Card Kingdom, near mint, their price list as of .
Eradicate 
Sorcery · Uncommon · Betrayers of Kamigawa · #65
Exile target nonblack creature. Search its controller's graveyard, hand, and library for all cards with the same name as that creature and exile them. Then that player shuffles.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.39 to $8.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Betrayers of Kamigawa | 65 | Uncommon | $0.39 | $1.99 |
| Urza's Destiny | 60 | Uncommon | $0.49 | $8.99 |
6 rulings from Wizards of the Coast
- 4 October 2004Use the name of the card as it leaves the battlefield.
- 4 October 2004Does not exile other cards of the same name that are on the battlefield. Just from the graveyard, hand, and library.
- 4 October 2004If a copy card is targeted by this effect, you get to look for another copy of the card it is copying. This is because a copy card actually takes on the name and initial characteristics of what it copies.
- 1 February 2005The copies must be found if they are in publicly viewable zones. Finding copies while searching private zones is optional.
- 1 February 2005If you manage to turn a land (such as a Forest or Stalking Stones) into a creature, you can indeed use this effect on that basic land type. Eradicate’s exile effect only looks for cards by name, not type.
- 1 May 2012A face-down creature has no name, so no card can possibly share a name with it (not even other cards with no name). If you Eradicate a face-down creature you will still search its controller’s library, but you won’t be able to exile any cards from that library.