You can currently buy am Amazon Dash Button for $0.99 with promo code CYBERDASH. Once you use the button the first time to place an order, you will receive $4.99 credited to your account for a net gain of $4. If you’ve purchased and/or used Dash BUttons in the past, you still qualify for this promotion, since the $4.99 credit is per button. However, it appears you can only purchase one button at the $0.99 discounted price this time around.
Dash Buttons are available for over 200 brands. You configure the button to order a specific item from Amazon and place it in a convenient location. Then just press the button anytime to order the item. The button is smart enough to not place a second order if there is an open order that hasn’t arrived yet, so there’s no fear of accidentally ordering too many of the same item at once. Plus, you get a notification on your phone whenever the button is pressed and have time to cancel the order in case the button was pressed accidentally.