Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Augur of Bolas 
Creature — Merfolk Wizard · 1/3 · Common · The List · #MM3-30
When this creature enters, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
7 printings · $0.35 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2013 | 30 | Uncommon | $0.59 | — |
| Foundations Jumpstart | 286 | Uncommon | $0.35 | — |
| Magic 2013 | 43 | Uncommon | $0.39 | $3.99 |
| Modern Masters 2017 | 30 | Common | $0.39 | $0.79 |
| The List | MM3-30 | Common | $0.39 | — |
| War of the Spark Promos | 41 | Uncommon | — | $2.29 |
| War of the Spark | 41 | Uncommon | $0.35 | $0.99 |
2 rulings from Wizards of the Coast
- 1 July 2012You don't reveal the other two cards, nor do you reveal their order on the bottom of the library.
- 1 July 2012If there are fewer than three cards in your library when Augur of Bolas's ability resolves, you'll look at the remaining cards. This won't cause you to lose the game as you haven't drawn from an empty library.