Cheapest priced copy (Judgment): $2.99 at Card Kingdom, near mint, their price list as of .
Spelljack 
Instant · Rare · Judgment · #51
Counter target spell. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. You may play it without paying its mana cost for as long as it remains exiled. (If it has X in its mana cost, X is 0.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $2.99 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Judgment | 51 | Rare | $2.99 | $7.99 |
3 rulings from Wizards of the Coast
- 4 October 2004If you cast an instant or sorcery, it goes to its owner’s graveyard when it resolves.
- 4 October 2004This spell can be used on a spell cast using Flashback.
- 1 August 2008If you use this on an opponent’s spell which has Buyback, you may pay the Buyback cost as you cast it. If you do so, the card will go to its owner’s hand upon resolution. It will not go to your hand, nor to any player’s graveyard.