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 our mention from three weeks ago 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.