Cheapest priced copy (Double Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Darksteel Axe 
Artifact — Equipment · Uncommon · Scars of Mirrodin · #149
Indestructible (Effects that say "destroy" don't destroy this Equipment.)
Equipped creature gets +2/+0.
Equip {2}
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
4 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 247 | Common | $0.35 | $0.49 |
| Iconic Masters | 214 | Common | $0.35 | $0.49 |
| Modern Masters 2015 | 208 | Uncommon | $0.35 | $0.49 |
| Scars of Mirrodin | 149 | Uncommon | $0.35 | $0.99 |
2 rulings from Wizards of the Coast
- 1 July 2013Although Darksteel Axe has indestructible, it can still be put into the graveyard for other reasons. The most likely reason is if it's sacrificed.
- 1 July 2013Darksteel Axe itself has indestructible, not the creature it's equipping.