When I discovered local Op shops bin books and chuck out any CDs that they " don't like" , I decided better to sell for at least a few dollars rather than add to the pile at the dump. It makes it easier to lose a collection if done a few at a time.

I agree with digital*ghost's suggestion of doing a search first. For example, a search of DVDs at sold price range $10 to $20, located within AU and with region code "all regions" shows 1,376 were sold between 9/10/21 and today.

Good luck.