In the condition the box was described, it's used. Not in shrinkwrap plus sticker on box equates to used. It's not a collectors item, and it's not a classic SNES game, either.
It's probably only worth about $5-10. I spent a long time working at a store that sold used games, everything from the 2600 to the newest gen consoles, if someone came in with this, I'd offer them three bucks for it then put it on the shelf for $10.
SNES games in boxes (generally) aren't instant collectors items unless they're made by Atlus, Square, Enix, or Nintendo.