Nexus 5X is available to buy for just $274.99 on eBay today which is almost $100 OFF Now. So if you are planing to buy an Android phone under $300 this is the best you can get.
LG Nexus 5X is having a fingerprint sensor at the back, It is powered by Qualcomm Snapdragon 808 processor with 2GB of RAM, it also features a 5.2-inch 1080p display, Nexus 5x also includes a USB Type-C port. You can check here for detailed specs information of Nexus 5X.