Kroger has the blue echo dot on sale for $15.00 plus tax ymmv not all stores showing this price
Using the kroger clicklist app or website add to cart and chose in store pick up for free pick up.
Shipping is $11.95 extra.
Not sure if you can walk into a store and just buy it off the shelf. It may be only available through the app or website.
Firestick is possible for $12 YMMV