How can you get textbooks at better prices, find deals online and even barter them?

When our parents went to college, textbooks were costly, but they weren’t anything like they are now. But, you can find resources to get them cheaper, even free sometimes. Did you ever think of bartering them? Have you checked ebay? craigslist? Lots of options exist and site about ADHD kids at school can help you find the secrets in the system.