I used to volunteer with my local thrift store and anytime there was something donated they didn't think they could sell it would get sent to goodwill lol
I do this too. Any junk that might be sellable but likely not goes to Goodwill so they can deal with it. The decent items go to a local thrift shop that actually helps the community.
My local goodwill turns down anything that's not perfect because I live in a high cost of living area and they're getting fed high quality items from across the country.