Roundup of useful sites for frugal academics and students:
- The best sites to download free movies, music, TV and books (TechRadar)
- Bigwords.com -- a search engine aggregator that crawls the web for the best deals to buy or sell your old textbooks, etc
- Amazon.com's Textbooks Trade-In
No-hassle way of unloading unwanted textbooks and getting some money for it.