Cheapest priced copy (Jumpstart 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Pit Keeper 
Creature — Human Wizard · 2/1 · Common · The List · #MM3-81
When this creature enters, if you have four or more creature cards in your graveyard, you may return target creature card from your graveyard to your hand.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
5 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart 2022 | 455 | Common | $0.35 | — |
| Modern Masters 2017 | 81 | Common | $0.35 | $0.49 |
| The List | MM3-81 | Common | $0.35 | — |
| Time Spiral | 123 | Common | $0.35 | $0.49 |
| Time Spiral Remastered | 130 | Common | $0.35 | $0.49 |