1. If the phones were stated as brand new, then why did they also state that the phones were tested and approved. If that was the case, then they are not really new.
2. Sprint and Nextel are not GSM providers.
3. If they were a legit company, why would they be using forums to advertise. And why would they also use free email. Also, using the name 'God' or phrases like 'God bless' is just a way for you to lower your guard and think that they are good and honest people.
4. More than likely if you respond to them and they ask for payment, it's going to be in the form of a money order. If they were a legit company, they would accept credit cards or electronic checks from Paypal and such.
This is a scam. They primarily target users new to the forums because they don't know any better. They see it and get anxious to have a phone for such a cheap price. But if you don't believe me then hey, go ahead and send your money and see if you get something in the mail from them.