Cheapest priced copy (Commander Legends): $0.35 at Card Kingdom, near mint, their price list as of .
Merchant Raiders 
Creature — Human Pirate · 2/4 · Uncommon · The Lost Caverns of Ixalan Commander · #163
Whenever this creature or another Pirate you control enters, tap up to one target creature. That creature doesn't untap during its controller's untap step for as long as you control this creature.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends | 81 | Uncommon | $0.35 | $0.49 |
| The Lost Caverns of Ixalan Commander | 163 | Uncommon | $0.35 | — |
3 rulings from Wizards of the Coast
- 10 November 2020The triggered ability can target any creature, including one that is already tapped. In that case, the creature stays tapped and won't untap during its controller's untap step.
- 10 November 2020The ability stopping the creature from untapping will continue to apply to it even if the creature changes controllers.
- 10 November 2020If another player gains control of Merchant Raiders, the creature will no longer be affected by the ability stopping it from untapping, even if you later regain control of Merchant Raiders.