Where can I get used, cheap DVD movies online?

I buy used video games at half.com. They’re typically a lot cheaper then new. They have movies too.

Netflix has used (or previously viewed) DVDs from 5.99 to 9.99. If you don’t want to be a permanent member, purchase the DVDs during the 2-week trial.

I have never purchased from this site, although I have it in my favorites, should the need arise:
http://www.justthedisc.com/dvd/

DVDs are $4. Free shipping when you buy 5 or more.

You can watch many movies for free, on YouTube®. Here are two examples:

Darby O’Gill and The Little People

The Time Machine

I saw a website where you can trade cd’s and dvd’s with other people. I’d have to get back to you with the name of the site.