I don't really know the prices there, but the Moto G3 or Moto E are always nice choices.
Or, based on tomshardware recommendations, Asus ZenFone 2 (ZE551ML 2gb 1.8GHz) is a really good choice. I have bought the Asus recently and I'm very happy with it. It has Android 5.0, and will soon upgrade to 6.0.
(Just be careful because it is not yet compatible with Pokemon Go, if you intended to play that)