I have a friend in jail and whenever I go to send him books I go through Amazon, since I am not allowed to send him the books directly (whoever came up with that jackass rule?) Anyhow, if you do a search on Amazon and have it sorted by price, you can find thousands of books for a penny. Seriously, The shipping costs anywhere from 2 bucks to 5 bucks generally, my guess is that the companies don't have to give Amazon a cut of the shipping costs, but anyhow, I suggest you buy your books that way! It's a cool way to discover authors you haven't heard of, too!

Here's an example of a search I did for gothic books, sorting by price low to high:

http://amazon.com/s/ref=sr_st/104-83...hic&sort=price