Where to sell DVDs/Blu-rays?

As the subject says... it's time to get rid of years worth of DVDs and Blu-rays and maybe some music CDs as well. We realized the other day that it's been years since we watched what we owned instead of streaming.

Anyone have any suggestions of a particularly good place to sell them?

Either because of better prices or because the location does something better with them, like I'd take less money knowing they raise money for a marginalized community with their re-sale.

Thanks!