Not that I've found. Despite feeling like they must be worth something I've never found an actual use case for an old smartphone besides giving it to someone who can't afford their own. I would love to donate old phones to a social service to be given to job seekers, homeless, domestic violence victims, etc.

I'm kinda grateful iPads and tablets were hella expensive when my kids were small because now the temptation to give the baby their own iPad because they are cheap on Woot or whatever must be tremendous.