Best Buy: Amazon Smart Plug For $4.99 ($24.99 regular price) L3 - Also, (YMMV) 99 Cents After Promo Code on Amazon.com L1 (exp unk)
Best Buy has the Amazon Smart Plug for $4.99 when you order using ‘Alexa, ask Best Buy about Voice-Only Deals’. Limit 1, but you can get up to 3 if you order separately one-by-one.
Shipping is $5.95, but you can do free in store pick up or spend $35+ for free shipping.
Amazon has these on sale as well. [YMMV] Amazon: Smart Plug For $0.99 With Promo Code SMARTPLUG99, SMART10, AMZNPLUG, PLUG. Of course, 99 cents is a better deal than $4.99, so you may want to see if any of these codes work for you first. Limit 1.