Cheapest priced copy (Marvel's Spider-Man): $0.49 at Card Kingdom, near mint, their price list as of .
Secret Identity 
Instant · Uncommon · Marvel's Spider-Man · #43
Choose one —
• Conceal — Until end of turn, target creature you control becomes a Citizen with base power and toughness 1/1 and gains hexproof.
• Reveal — Until end of turn, target creature you control becomes a Hero with base power and toughness 3/4 and gains flying and vigilance.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Marvel's Spider-Man | 43 | Uncommon | $0.49 | $0.49 |