James McMurray
First Post
The endless quiver magic item doesn't exist in my campaign--but if you're looking for the RAW answer, it's a level 9 wondrous item in Adventurer's Vault.
9th level? That's ludicrous. Before AV came out we made an endless quiver for the cleric in our epic game. I put it at 1st level. That's 360gp, which is the same as the price of 10,800 quivers, or 30 shots per combat for 360 fights. Putting it at 9th means you're effectively buying 126,000 arrows.
I guess the fluff for infinite creation makes sense to be higher level, but balancewise there's no reason to ever buy an endless quiver. It's primarily a convenience for the player, which very rarely might matter in the game.