Samsung Galaxy A5 2017 SM-A510F

Samsung Galaxy A5 2017 SM-A510F
Gold Colour
Lcd Screen was replaced and a new battery fitted.
But was never really used after that
2 Problems to fix
Return button does not work 
and the phone freezes every now and then especially after a phone call
My guess is the proximity censor is faulty
Otherwise its a good phone
Phone was in a protective cover since day 1, still looks like a new phone
Please don't buy the phone and give me a bad rating afterwards, 
I've mentioned the 2 problems and you are buying it as is for parts or to fix.
Original box is included but no charger or charging cable.