I'd use something like Curbit if it matched my stuff with charities that want it.

I believe (on faith) that local charities make better use of my stuff. My "go to" charity is the local services for the blind, because an ex-gf works for eye surgeons.

Though it'd be more convenient, I'm loathe to give to Goodwill (greedy execs, bad labor relations), Salvation Army (homophobes, jesus freaks), Red Cross (misrepresenting how donations are used).

I'm cool with Habitat for Humanity.

[I live in the USA.]