You won't get a 4x for that price, but you can get a 5A for under $100. For that price you'll get a Snapdragon 425, 2GB of RAM, a surprisingly bright 720p display and a non-awful camera. I can only assume that these devices will sell for vastly below the listed price in their target markets, otherwise they're going to flop miserably.
https://www.banggood.com/Xiaomi-Redmi-5A-Global-Edition-5_0-...