I thought this website was really helpful for a college student or just someone who would like to clear some space in their video library (or make room for more). Here are the details:

Buy and Sell DVDs at TextbookX.com! Over 40,000 Titles Available, Free Shipping Over $49.

TextbookX.com is the place to buy and sell new and used discount textbooks, general reading and reference titles. We have over 930,000 titles in stock, most shipping within 1-2 business days. With average savings of 50% off new book prices, students, educators, and general book buyers enjoy 10% to 80% savings off retail prices - when they purchase through our marketplace. Students can also sell their used textbooks on the marketplace for an average of 200% more than typical bookstore buyback prices.