My son & I both have an iPhone 3G, 8GB and we're planning to upgrade to iPhone 4s. Radio Shack will give me $100 each for them but if I can get more than that obviously that would be my preference. They're both black and in excellent condition - nothing at all wrong with them. They're not jailbroken or unlocked (I don't even know how to do that or if it makes them worth more money). Anyhow, any thoughts on how much I might be able to get for these if I sell them instead of trading them in at RS? Anyone interested?