Trade in iPhone 3Gs 32GB and iPhone 4 16GB for newer iPhone?

Is it at all possible to trade in a 3Gs (Used) and 4 (New) for a new 4S?

You can't, my girlfriend tried.
It's best to get a New one from Amazon that do the best deals.
http://amzn.to/....to/Qwkyvu

Trade with who? Why would anyone give you a new one for old ones? That makes no sense at all.

You can recycle the old ones back with apple and they will give you store credit for it, check the $ here: http://www.apple.com/...recycling/