For Prime members only, Amazon offers the Amazon Dash Wand with Alexa for $20 with free shipping. Even better, after you register your Dash Wand, you'll receive a $20 Amazon Credit. Provided you use the credit, that's tied with last week's mention as the best deal we've seen, essentially making the Dash Wand free. The Amazon Dash Wand is a WiFi- and Bluetooth-enabled device that allows you to add items to your cart by either saying or scanning whatever it is you want. The $20 credit will expire on June 1, 2018.