What should I consider before buying an iPhone on eBay?

I'm with the company Verizon and I would like to upgrade to another phone for the gigs. I'm happy with the model I have it's just that it only has 8GB. I'm trying to buy one from eBay because I know it will be cheaper, but I don't want to get scammed. So what should I consider?

I'm going on a plane and i need music

Ok so i'm going no my plane ride and i need music i usally record i from youtube by my camera. But my internet isn working so yah, i did download this app whree you can watch youtube music on your phnoe whith Wi-Fi but i'm nt sur eif there's Wi-Fi on the plane. 1. Do you know any apps that can download free youtube vdeos without Wi-Fi? 2. I have a few music in my macbook, so how do i transfer that to my iphone 4? 3. How do i download music to my macbook. (ill probably go to the library and do it) thtas anout it i really need music sorry i'm a bit new in this studd so yah thanks!

Iphone 3gs stuck half way through updating?

I was updating my iphone 3gs and I think my phone died half-way through… I'm not sure. But it is frozen on that screen. I've turned my phone off and turned it back on, i've held down the home and lock button, and i've let it die. And when it turns back on its still the same screen

What do you do if your iphone won't charge?

I went to plug my iPhone 5 in today, and it didn't charge.
i thought it might have been the wire of outlet, so i tried a bunch of different ones, and it still didn't charge.
i tried to connect it to iTunes, but it didn't even connect, like my iPhone didn't appear and i couldn't sync it.
i restarted it and it didn't work.
i know i could go to apple and they'll give me a free one, but id rather try to fix it myself.

I Want To Know How To Do It?

I'm wanting to make my own minecraft server and I have a Linksys router. I'm 13 and I don't want it to mess up our Wi-Fi for our ipods and ipads and iphones! I have tried admin, Administrator and all that stuff but i have heard that you need to hold the reset button for 30 secs and that will reset it! But will it reset our Wi-Fi password and all of our internet! Please answer if you are absolutly 10000000% sure on your answer! Or give me other suggestions!

Why won't my iPhone 4's flashlight turn off?

I accidentally dropped my phone in some water, so I left it in a bowl of rice for about 24 hours, and it's working now, but while I was charging it to see if it worked, the flashlight turned, and it won't turn off. I tried to turn it off with my flashlight app, but that didn't work.