Has anyone bought any of the study guides or flashcards being sold on Ebay? I am new at this DSST testing and am wondering if there is an "easy" way to study for these test. I have taken Here's to Your Health and passed it and am getting ready to take "Drug and Alcohol Abuse" tomorrow a.m. On to my next test after that, but have seen several study guides, cards and such on DSST and CLEP exams on Ebay and just thought I would ask you guys what you thought about them. Good Idea or no?

Thanks in Advane!