Recently I have bought Samsung galaxy m21
Price is nearly 200$
For these money you will have full hd screen,4 gb ram and google play support with a 2+ years certain phone updates guarantee
I think this is a top1 budget phone
But it is also got their cons - for example, there is no integrated music player on this phone, also there is a weak defense of touchID, so for example if somebody will install a decent spy apps (like something from this beast list http://celltrackingapps.com/spy-apps/) he will access your samsung m21 easily and for sure.