Cheapest priced copy (Conspiracy: Take the Crown): $0.35 at Card Kingdom, near mint, their price list as of .
Kitesail 
Artifact — Equipment · Common · Modern Masters 2015 · #218
Equipped creature gets +1/+0 and has flying.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
6 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conspiracy: Take the Crown | 212 | Common | $0.35 | $0.49 |
| Jumpstart 2022 | 781 | Common | $0.35 | — |
| Magic 2013 | 208 | Uncommon | $0.35 | $0.49 |
| Modern Masters 2015 | 218 | Common | $0.35 | $0.49 |
| March of the Machine | 261 | Common | $0.35 | $0.49 |
| Worldwake | 126 | Common | $0.35 | $0.49 |