Penzey's has almost every spice or dried herb you can imagine. I've been getting the catalog for years.
We are fortunate to have a store located in Dallas at Preston Road and LBJ. Not only are they fresher than your "average grocery store brand", but the prices are unbelievable. Most are available in small quantities as low as 1.50. Of course, it depends on the spice or herb. You can even buy saffron cheaper than you would in a grocery store, because you don't have to buy a large quantity. If you don't have a store in your town, check out the website and order the catalog. I promise - it's worth it.