Cheapest priced copy (Darksteel): $9.99 at Card Kingdom, near mint, their price list as of .
Shield of Kaldra 
Legendary Artifact — Equipment · Rare · Darksteel · #139
Equipment named Sword of Kaldra, Shield of Kaldra, and Helm of Kaldra have indestructible.
Equipped creature has indestructible. (Damage and effects that say "destroy" don't destroy it.)
Equip {4}
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $9.99 to $37.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Darksteel | 139 | Rare | $9.99 | $37.99 |
| Darksteel Promos | 139★ | Rare | — | $10.99 |