Doesn't matter if Salvia is legal or not. It is illegal for a minor to purchase anything at a headshop. Brand new pipes are much harmless than Salvia is, so why can't they buy them? No minors can purchase anything in a headshop. Yes, it's stupid that someone can't buy a pack of papers with a strip of glue on there, but that's the way it is, and you can argue all you want, but you'll come off looking quite dumb.

If Salvia was sold at Safeway or Wal-Mart, then yes, it is legal for them to buy it, but a headshop, much like a porn store, you have to be of age to purchase any of it.