Yes all Iphones can be used in all country's, the only problem would be the charger.
That is the only thing that is totally different in The Usa, but a charger you can easily buy.
Good deal but how do I know you are not gonna scam me if I buy the phone?
Because I think you want the buyer to pay upfront ye?
We are talking for the LG G3 not for the iPhone, i know that there are many different types of chargers that is the smallest problem i think, also he mentioned that he accepts escrow, and if i choose to deal i would go with escrow.