You can wait for Amazon sales and try them with exchange. I got my 5.7K for my Redmi 5, when exchanged with Redmi K50i.
Otherwise, you won't get much for old phones. You can use them for making calls or use as hotspot.
I second what @zindabad said. Trying to see if any of these will be taken via Amazon exchange would be the only way, and at least that would be better than trashing it entirely.
Received the Moto G5 plus today. Thanks @BRUT bro.
Dismantled the mobile and checked the internals.
Motherboard gone kaput and battery lost its life.
Display is working fine. It will be transplanted to my another display damaged moto g5 plus.
@Mods
Im trying to leave feedback, but the thread is not available/listed in the drop down.
Please help.