Where can I buy a cheap iphone 4?

I've been trying to find myself a iphone but everywhere I look they are so expensive. I've never had an iphone and all my friends have one and I mean all of them. I've asked people where they got theirs and they usually say someone gave it to them or it was from the 99 cent plan. I have a job so I can afford one but I want to find a good quality cheap one. Please someone help. I'm 16 btw.

Do I have to ground esd mat?

I'm fixing iPhones and static mucks up the screens so I have a Matt with a popper on it that attaches to my wrist band but does any thing have to be connected to the mat like a ground from a power outlet or does it just get discharged through the mat

To transfer songs from laptop to iphone- is this illegal?

I'm new to apple products but what I have gathered is that you can't download songs without paying for them on itunes?! What my friend did though, is

1. Go onto youtube and search her favourite song
2. Using the song's url, she converted it into mp3 through YOUTUBE to MP3 converter
3. It downloaded onto her laptop
4. She used that downloaded song and put it on itunes, her playlist
5. She connected her iphone to the laptop and transferred the song from itunes to her phone

is this illegal? If it is, how can she get caught? Seriously worried, please only sensible answers.
and also, EVERY WEBSITE we used was legal, such as youtube and mp3 converter! None of the websites were pirated.

How to check if the iPhone is stolen?

I'm looking to buy an iphone 5c but want to make sure that it is not stolen. Now that iphone has come up with a lock that they place on all stolen/lost phones and any SIM card placed into those phones gets fried, I need a different way of seeing how a phone has this lock on it if it happens to be stolen/lost. Of course, most people would never admit if they stole the phone or found it, so there's no telling if your buying a phone that works or a phone that'll just fry your SIM card. With all that said, is there different ways to check if the phone has this lock other then just placing your SIM card inside to check?

How much can i sell a water damaged iphone 5s on ebay? - 1

My iphone 5s stopped working because of water damage. If i can't get it fixed, i want to try to sell it. Its in perfect condition, the screen is flawless (always had a screen protector), the back is flawless, everything looks fine except i don't know if the water damaged the screen in any way since it won't turn on. I bought it for about $600, how much can i sell it for?

I'm frustrated over my battery life(iPhone 5s/iOS 7.0.4)Is this normal?

I used my iPhone 5s for 3 consecutive hours last night. I watched a couple of videos and chatted a friend on Facebook for an hour. Then I woke up and started using my phone again.I've been using it for a total of 5 hours and 52 mins. My standby time is 19 hours and 16 mins as you can see.Is this normal or does my battery life suck?
IIm frustrated over my battery life iPhone 5s iOS 7.0.4 Is this normal

How to connect my iPhone 5c to my tv?

I bought this cord on eBay that let's me connect my phone to my tv but when I try all the different inputs it doesn't show anything on the tv. Is there an app I need to download or a setting I need to change?