Cheapest priced copy (Guilds of Ravnica): $0.35 at Card Kingdom, near mint, their price list as of .
Enhanced Surveillance 
Enchantment · Uncommon · Guilds of Ravnica · #40
You may look at an additional two cards each time you surveil.
Exile this enchantment: Shuffle your graveyard into your library.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 40 | Uncommon | $0.35 | $3.99 |
| Murders at Karlov Manor Commander | 102 | Uncommon | $0.49 | — |
3 rulings from Wizards of the Coast
- 5 October 2018Enhanced Surveillance's last ability can be activated only while it's on the battlefield.
- 5 October 2018If you control a second Enhanced Surveillance, their effects both apply and you may look at an additional four cards. If you control a third, may look at an additional six cards, and so on.
- 5 October 2018The additional cards you look at due to Enhanced Surveillance's ability are part of what you surveil. You may put those cards into your graveyard or back on top in any order along with the others.