Cheapest priced copy (Magic 2010): $2.29 at Card Kingdom, near mint, their price list as of .
Indestructibility 
Enchantment — Aura · Rare · Magic 2014 · #23
Enchant permanent
Enchanted permanent has indestructible. (Effects that say "destroy" don't destroy that permanent. A creature with indestructible can't be destroyed by damage.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $2.29 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Magic 2010 | 17 | Rare | $2.29 | $4.99 |
| Magic 2014 | 23 | Rare | $2.29 | $5.99 |
3 rulings from Wizards of the Coast
- 1 October 2009If an effect would simultaneously destroy Indestructibility and the creature it’s enchanting, only Indestructibility is destroyed.
- 1 July 2013If a creature enchanted by Indestructibility is dealt lethal damage, the creature isn’t destroyed, but the damage remains marked on the creature. If Indestructibility stops enchanting that creature later in the turn, the creature will no longer have indestructible and will be destroyed.
- 1 July 2013Lethal damage, damage from a source with deathtouch, and effects that say “destroy” won’t cause a permanent with indestructible to be put into the graveyard. However, a permanent with indestructible can be put into the graveyard for a number of reasons. The most likely reasons are if it’s sacrificed, if it’s legendary and another legendary permanent with the same name is controlled by the same player, if it’s a planeswalker and another planeswalker with the same subtype is controlled by the same player, if it’s a creature with toughness 0 or less, or if it’s an Aura that’s either unattached or attached to something illegal.