Should i buy an iphone from ebay or tmobile?

I'm planning to get an iphone 5s 16gb this weekend but I don't know if i should buy it off Ebay and save about $100 or pay the full price at T-mobile. I'm afraid that I will get scammed by the seller on ebay but i also would like to save $100. I also want it brand new because i love to keep things new and in perfect condition but the guy on Ebay has his box opened (although the front and back protecters are still on). What do you guys recommend?

Some good things can come from eBay but in this instance I would get it from T-mobile. If the phone was stolen then you will have a lot of trouble and no compensation to get another one. Also if the phone is not unlocked or already setup for T-mobile then you'll have a headache getting it to work. It isn't worth the 100 bucks for the problems you could have.

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