Cheapest priced copy (Adventures in the Forgotten Realms): $0.35 at Card Kingdom, near mint, their price list as of .
Trickster's Talisman 
Artifact — Equipment · Uncommon · Adventures in the Forgotten Realms · #79
Invoke Duplicity — Equipped creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, you may sacrifice Trickster's Talisman. If you do, create a token that's a copy of this creature."
Equip {2}
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Adventures in the Forgotten Realms | 79 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 23 July 2021If your Trickster's Talisman is somehow equipped to a creature another player controls, that player will not be able to sacrifice Trickster's Talisman as the triggered ability resolves as they don't control it.