Use or new smartphone for $100-150 (the cheaper the better)

Hello everyone,

My partner is in need of a new smartphone and I have no idea about them. We really don’t care about any special features. What we need and want is
– Android based system
– good voice/speaker quality
– good and replaceable, lasting battery
– a nice (but not high end super) quality camera (I myself have an iPhone 5s and am very happy with its camera quality, something comparable would be nice)
– runs smoothly, some lag is alright, it doesn’t have to be anything that starts up within 1 sec and all apps are up and running. If it takes 5-10 secs that’s totally okay if you know what I mean 😉
– price range 110-160 USD (100-150 EUR)

Can you please help?
Thanks very much in advance!