One way is to go to the kindle store, choose the kind of book you want (Amazon calls it a "Department") and sort by price. For instance, here are programming b

One way is to go to the kindle store, choose the kind of book you want (Amazon calls it a "Department") and sort by price. For instance, here are programming books: http://www.amazon.com/s/ref=sr_st?bbn=726697011&qid=1345228988&rh=n%3A133140011%2Cn%3A!133143011%2Cn%3A!251259011%2Cn%3A1286228011%2Cn%3A726697011%2Cn%3A156140011&sort=price http://www.amazon.com/s/ref=sr_st?bbn=726697011&qid=1345... It's not perfect but you can find good deals this way.