This really sucks. I just filed a claim with half.com, I never received a textbook that I paid for more than 3 weeks ago, no response from seller. What do I do now to get my money back? I also just filed another dispute because of a non-payer who purchased a book from me. I could have totally sold the book to someone else! THis person wasted my time for two weeks, and students probably do not need it anymore. Frustrating. I want to leave negative feedback, but I'm afraid they will do the same. What should I do? THANK GOD these were only textbooks!!