The TP-Link Smart Plug Mini is currently on sale for $20.99 when you apply the promo code TPLINK at checkout. This price is just $1 more than the lowest price this plug has ever been, which occurred for just a few hours on Cyber Monday. The regular price of the plug is $27.99 and the promo code knocks off 25%, which makes this a great deal for one of the most popular Alexa compatible plugs. The “mini” nature of this plug allows you to plug it into a standard outlet without blocking the adjacent outlet, or you can stack two of these plugs in the same outlet. The 25% discount will be applied to as many plugs as you want to purchase. There are many cheaper no-name Alexa compatible plugs available of questionable quality, but it seems like TP-Link has hit a sweet spot with both affordability and quality, which is why their products dominate Amazon’s list of best-selling plugs.
It appears as though this deal is targeted towards specific people because the promo code is not working for everyone. For me there is a banner at the top with the promo details and the $7 discount is applied at checkout. You may need to have an Echo device registered to your Amazon account for the promo code to work.