How to sell your iPhone 4 for enough cash to buy an iPhone 5 | Los Angeles Times | How to Use an iPhone Well |

IPhone 4S users typically aren’t eligible for upgrades yet, though they easily could sell their phones at numerous websites for at least $200. But it’s a bit trickier to do with the older 4, which launched in 2010. Those users might be able to do much better at one of the websites here.