years ago (like maybe 10?) we bought thin plastic sleeves and threw out all the bulky cases. probably fit 150 dvd's in a shoe-box or two that are shoved in a closet somewhere. There is a rack in a storage area in our basement with all the "box sets" (like my entire collection of Smallville seasons
) that got shoved back there when we moved into this house 6+ years ago. I don't think I even have a DVD player any more.
That said, a little over 10 years ago, I gave away my 200+ CD collection. I spent a couple days and burned a bunch of them to MP3 (pointless nowadays) and kept maybe like 5 of them that were sentimental. I just gave them to a friend who said he'd take them and I told him it was fine if he threw out whatever he didn't want.
You can donate all your stuff to like goodwill, savers, the salvation army, etc... Usually they resell them for like $1 each.