I'm not eligible until February but my phone barely works. I don't want to buy another one for just a couple months so I'm looking into getting the iPhone 4 (not 4s). Where can I buy one? I know craigslist or ebay, but those seem really overpriced. I saw that Target is selling them, do I have to be eligible in order to buy one of those? Or from Best Buy? I'd rather not buy off ebay or craigslist if possible.