My algorithm goes something like this:
- If I am just browsing (I tend to target complete series before I start reading them, so am often buying things I don’t expect to read for months) and looking for a great deal I go to Rasputin’s Books. Sometimes they have nothing, and other times I walk away with 30 books. They currently have a “10 books for $5” deal, which is hard to beat.
- If I want something specific, and its not too rare, I go to Book Buyers. They have an awesome collection, and have most common things. Some harder to find things might be missing though, and you need to know that not everything is filed by author (check the series section as well).
- If I want big lots, ebay.com. Most of the time there is nothing, but sometimes you can pick up 20 books by the same author quite cheaply.