A great alternative to buying DVD's.  Subscribe to NetFlix, and for a low monthly fee you get all the DVD's you want mailed to you, with free return postage.  I have been doing this for several months and it is GREAT.  I get 3 DVD's out at a time, for $19.95 a month.  You can get anywhere from 1 to 8 at a time, for different monthly fees.  Check it out!
Movies at Best Buy
DVD's and VHS Movies at CD Now.
Video series from TimeLife!
Discovery Channel  Video and DVD store.
DVD Avenue Banner Another place to rent DVD's through the mail.
Banner 10000069 Columbia House