About 60% of my old electronics I give away.
Mostly to my parents when it comes to modern devices (phones, tablets). True, I don't make money off that, but these are the people whose house I live in without having to pay anything. As a result, they're still willing to loan me money for a new device without interest. And it got my dad (who got my S3) to go from 'Smartphones are nonsense, those stupid youths are all obsessed with their phone, even on lunch break, nobody talks anymore!' to him spending 80% of his free time reading on his phone. Bonus!
Anything else that's still useful either finds another home or ends up donated to the Salvation Army.
The rest, I keep. You never know when you may find a use for it, and resell brings you about 5% of the original price here. Not worth it.
I only throw away something if it's completely unfixably dead and I can't find another use for it.
Money has never been of any worth to me other than that I can pay my bills. I'd rather have someone owe me than get a few quid out of it. Much more useful.