If you are a current iPhone user and plan on upgrading to the new iPhone 4S, make sure you check out the Apple Recycling Program page, you can get hundreds of dollars in Apple gift cards for turning in your old iPhone.

I did a test and a typical iPhone 4 in working order with a few scratches will give you a $140 credit, thats almost the full price of a new contracted 16GB iPhone 4S ($199).

iPhones as well as iPads and Mac or PC desktops and notebook computers qualify for the Apple Reuse and Recycling Program. Get more info and your online quote from http://store.apple.com/us/browse/reuse_and_recycle