Whenever I buy something at a website that has an option for coupon codes I always head to google to search. Usually something like "Amazon.com Coupon Codes" as a search will find me plenty of results. There are lots of websites dedicated specifically to coupon codes. 5-10 minutes of searching should find you the best deals out there should they exist. Unfortunately, I think that the online vendors are catching on to this practice, and they are using less and less coupon codes.

Oh well, it was fun while it lasted.