Amazon currently has a really good deal on a pack of 4 smart plug mini's right now, from Etekcity. These are going for $49.99, which is good for $50 off of the regular price, and that is also the price of one regular smart plug from any of its competitors. Making this an insane deal.
These smart plugs from Etekcity are a great buy for a few reasons, other than their price. These are "mini" so they won't cover up the other outlet, allowing you to use both. These also work great with Amazon Alexa and the Google Assistant, so no matter which assistant you are using, it'll work with that platform. Additionally, you can automate it with IFTTT, which is great for those that want to set a light to turn on when you get home, or when something happens. These are easy to install, as usual with smart plugs, and great for using with lights and other appliances.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap next-day shipping if you need it here extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime by hitting the link below. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year. Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.