Cheapest priced copy (Duel Decks: Elspeth vs. Tezzeret): $0.35 at Card Kingdom, near mint, their price list as of .
Razor Barrier 
Instant · Common · Mirrodin · #17
Target permanent you control gains protection from artifacts or from the color of your choice until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Elspeth vs. Tezzeret | 26 | Common | $0.35 | — |
| Mirrodin | 17 | Common | $0.35 | $0.49 |