Cheapest priced copy (Streets of New Capenna): $0.35 at Card Kingdom, near mint, their price list as of .
Snooping Newsie 
Creature — Human Rogue · 2/2 · Common · Streets of New Capenna · #222
When this creature enters, mill two cards. (Put the top two cards of your library into your graveyard.)
As long as there are five or more mana values among cards in your graveyard, this creature gets +1/+1 and has lifelink.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Streets of New Capenna | 222 | Common | $0.35 | $0.49 |
6 rulings from Wizards of the Coast
- 29 April 2022The mana value of a double-faced card in your graveyard is always the mana value of the front face.
- 29 April 2022The mana value of a land card is 0.
- 29 April 2022“Five or more mana values among cards in your graveyard” means there are at least five different mana values among those cards.
- 29 April 2022The mana value of a split card in the graveyard is the total mana value of both halves of that card. It does not have two mana values.
- 29 April 2022X is 0 when determining the mana value of a card in your graveyard.
- 29 April 2022If you have five or more mana values among cards in your graveyard and then some of them are removed such that you have fewer than five mana values among those cards, Snooping Newsie loses its bonus to power and toughness immediately. Notably, this may cause it to die if it now has damage marked on it greater than its toughness.