Amazon has iOttie's Easy One Touch CD Slot Car Mount on sale right now for just $16.42, that is around $3 off of its regular price. And while it's not the biggest discount on a car mount, it is a pretty decent one. Especially considering this is a CD slot mount, and it is not a magnetic one, but rather one with arms. So it does cost more anyways.
This iOttie Easy One Touch CD Slot Car Mount is one of the most popular car mounts on Amazon right now, and it's not hard to see why. It's well-built car mount that is able to hold your phone in place while you are driving. It uses adjustable arms to keep your smartphone in place, so that you don't need to worry about a magnet damaging your smartphone (which is a myth anyways, but many do still worry about it). This car mount will work with most phones and even some small tablets, as long as they aren't overly huge. It can swivel to be used in portrait and landscape as well. If you've been looking to use Android Auto in your vehicle, this is definitely the way to do it. As it is pretty cheap, and puts your phone at the right height. Of course, you likely aren't using that CD slot anyways.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $119/year (or $59/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.