Since OP is a newbie and asking to send email to him for the deals so if anyone planning to have a deal with this guy use trusted escrow service to avoid any issues later on.

I don't understand why he wants to sell BTC at so cheap price when the market price is around 20K. If you sell at 13.5K and buy at what price? No one will sell you below market price.

Also, this thread should move to currency exchange section - https://bitcointalk.org/index.php?board=53.0