Cheapest priced copy (Eventide): $0.35 at Card Kingdom, near mint, their price list as of .
Double Cleave 
Instant · Common · Eventide · #135
Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eventide | 135 | Common | $0.35 | $1.99 |
| Planechase | 100 | Common | $0.35 | — |
| Ultimate Masters | 214 | Common | $0.35 | $0.49 |