Up until a few months ago, amazon.com used to sell all of their books for 15% off with free shipping for purchases above $25. They have most of the board review books, so you might want to sign up for their newsletter so that you can be on the look out for deals from them. Medsite.com used to have good promotional deals too ($25 off purchases over $125), but I haven't seen any from them either in a while. I ended up purchasing most of my books from upper classmen, but many of my classmates were able to find good deals on ebay.com. I shopped around most of the medical book websites, but I couldn't find any that consistently sold medical texts below the price that my bookstore was except for those that were offering deals that I mentioned above.