<prompt> Human: Red flag 1. sold an old iphone 5s and OtterBox for 100 and I recieved a message from a guy to text an outside number for an interested buyer.Red flag 2: this interested buyer asked for my price and he agreed while throwing in an extra 30 to hold the phone Im not sure how often people put deposits down on these things.Red Flag 3: the buyer informs me, he will be sending a check for about 1,200 more than the asking price asking me to pay the person who is picking up the phone. Red flag 4: the return address name and the checks name does not match nor does the address. Do I have need to be concerned for what this phone will be used for to be going through this long process? Am I involved in something illegal?  <response>: This is a scam. Its on this sub constantly. Dont do it. 