These days, there are countless mid-range Chromebooks to choose from: the new HP convertible, the Samsung Chromebook Plus V2, the ASUS C302, and so on. But if you need a cheap model, Best Buy has the Samsung Chromebook 3 of 11.6 inches for only $ 129.99 at this time.
As you probably guess, the specifications are not great. It has a Celeron N3060 dual-core processor, a 1366×768 11.6-inch screen, 2 GB of RAM and 16 GB of eMMC storage. You can not expect much at this price, but you should handle basic productivity without problems. Although the product page does not mention it, it seems that it has Play Store.
The Chromebook 3 is a little old at the moment, but it still has quite a useful life: Google says it will remain compatible until June 2021. You can buy it on the source link below.