How trustworthy are they? How should look into these ratings in order to determine which are puppet ratings and which are genuine? I've recently found myself unable to purchase textbooks I need, so I've looked into amazon's selections (And I'll soon be researching electronic versions soon). I cannot torrent due to University policy. While looking at amazon I've found sales for $0.01 and even $0.25. My first impression is that this is a rip off and they may be deleting negative comments. However, I see that over one million ratings total to a 94%+ rating for multiple sellers. Radec suggests that universities may be clearing older editions. If that is the case, then I'm fine purchasing textbooks. Given the price, you might ask "Why not buy and see?". The problem with that is that I need to return textbooks by tomorrow if I plan on ordering them online. Thus, if they do not ship the textbook relatively soon, I will have bigger issues to consider.
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