Cheapest priced copy (World Championship Decks 1998): $1.99 at Card Kingdom, near mint, their price list as of .
Rainbow Efreet 
Creature — Efreet · 3/1 · Rare · Visions · #41
Flying
{U}{U}: This creature phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $1.99 to $2.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Visions | 41 | Rare | $2.29 | — |
| World Championship Decks 1998 | rb41 | Rare | $1.99 | — |