Kristin Davis Scam $250.00 from me. She claimed that she is located in Uptown Charlotte, NC Charlotte, North Carolina

Kristin Davis posted on Craiglist Raleigh  that she has a 2009 17 inches MacBook Pro for sale on March 29th for $500.00.  I contacted her via Craiglist services and she told me that she is located in Uptown Charlotte Area.  She offered that she can ship the computer to me if I agree to pay $250.00 with Greendot Moneypak.  After I provided her the money, she agreed to send me the tracking number.  However, the tracking number she provided does not have any record with the Post Office.  I tried calling her and contacted her via e-mail, but there is no response.  So please beware of this person.  She seemed to be sincere initially when she contacted you, but I guess I am just too Naive thinking that this will not be a scam.   Her cell phone is 919-675-3101.