Cheapest priced copy (Modern Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Auntie's Snitch 
Creature — Goblin Rogue · 3/1 · Rare · Morningtide · #57
This creature can't block.
Prowl {1}{B} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Goblin or Rogue.)
Whenever a Goblin or Rogue you control deals combat damage to a player, if this card is in your graveyard, you may return this card to your hand.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Masters | 72 | Uncommon | $0.35 | $0.49 |
| Morningtide | 57 | Rare | $0.49 | $1.99 |
2 rulings from Wizards of the Coast
- 1 April 2008If a Goblin or Rogue you control deals combat damage to a player while Auntie's Snitch is in your graveyard, you can return Auntie's Snitch to your hand, then you can cast it for its prowl cost that turn.
- 1 April 2008The last ability will trigger only if Auntie's Snitch is in your graveyard at the moment a Goblin or Rogue deals combat damage to a player. The ability will check again when it tries to resolve. If Auntie's Snitch hasn't left the graveyard by this time, you may return it to your hand.