Best way to trade in unwanted DVDs?

Craigslist perhaps? There are lots of stores like Gamespot and FYE that take in old video games and DVD’s and give you either cash or store credit. I would suggest those two are the way to go.

Do a search on your local yellow pages for used dvds stores, if they sell them, they most likely buy them. You normally don’t get much though.

Half Price Books

They don’t pay a lot, but they’re convienent.

Try Bookins! I love them, they trade DVDs and Books on a point system. Real trading, all you pay shipping for are the DVDs you receive. Check it out: http://www.bookins.com