Amazon has taken $30 off of the Sony Xperia XA2 right now, bringing the price down to just $319. That's a great price for this unlocked smartphone, that is decidedly a mid-ranger but can still handle anything you throw at it. Definitely a good option for an inexpensive smartphone.
The Xperia XA2 sports a 5.2-inch full HD display, with curved 2.5D Corning Gorilla Glass included. So you're getting a great display here that will also lead to great battery life, which is a 3,300mAh capacity here. It is powered by the Snapdragon 630 octa-core processor, with 3GB of RAM and 32GB of storage. There is also a micro SD card slot available, to expand storage should you need to do so. Sony has included a 23-megapixel camera here on the rear of the Xperia XA2, which has an f/2.0 aperture here and can do 4K video. There is also support for 120fps slow-motion video here. Sony has a 8-megapixel front-facing camera here as well, for taking those selfies. Finally, this is an unlocked smartphone, but it will only work on GSM carriers. That means that this will work on T-Mobile and AT&T in the US - as well as MVNO's and prepaid carriers like MetroPCS, Cricket, Straight Talk and more, that run on those networks. Unfortunately, Verizon and Sprint networks are not supported here.
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 $99/year (or $49/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.