Try Crag's List, maybe someone there will want them.
FreeCycle..I'm sure that someone will want them.
I sold a banker's box full of them at auction 10 or more years ago, and was surprised at the loot I got for them.
Don't just throw them away. I still have some and my son gave me a lovely wood machine that will play them and at the same time make a CD from them. Check this out on the Internet, you might want to get one to be able to listen to the oldies again.