Cheapest priced copy (Urza's Legacy): $37.99 at Card Kingdom, near mint, their price list as of .
Memory Jar 
Artifact · Rare · Urza's Legacy · #129
{T}, Sacrifice this artifact: Each player exiles all cards from their hand face down and draws seven cards. At the beginning of the next end step, each player discards their hand and returns to their hand each card they exiled this way.
Legal inCommander
Restricted inVintage
Banned inLegacy
Not legal inBrawlStandardPioneerModernPauper
2 printings · $37.99 to $699.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Urza's Legacy | 129 | Rare | $37.99 | $699.99 |
| From the Vault: Relics | 8 | Mythic | — | $47.99 |
One ruling from Wizards of the Coast
- 4 October 2004You can’t look at the cards you exiled until they return to your hand.