Amazon is offering up Dash Buttons for Only $4.99! Also, you'll receive a $4.99 credit after your first press. So after your $4.99 credit, it's like getting the dash button completely FREE. Also, for a limited time they are offering a different dash button each day for only $.99, making them better than free after the $4.99 credit.
This deal is valid through December 31st, 2018.