Read the fine print. You are correct that the selection from Amazon qualifies for Super-Saver shipping (no charge). However, you must purchase a total order over $25 to qualify.
As for the Eek source, if you check them directly, they charge $5.59 for shipping. I don't know if that follows through if they are purchased Eek-Amazon, but it's something to consider.
Another option is Circuit City web-order-store-pickup. I believe if you order from the web, and select delivery to a store near you for pickup, you don't pay shipping. They had it for $18.39 a couple of weeks ago, and have other sales all the time.
Wherever you purchase them, they're worth it.