One more security, If you don't know the person or if they have not been a member for a long time. Use pay pal and Purchasing merchandise. That way you can get your money back if they do not ship. or if the merchandise is not as described.Thats no good .
One thing that stands out . The person joined in September . The only posts made were sales post . That's a red flag in my book . Get a phone number and call . If that goes well fine , if the call is all over the place then you might move on .. click on there name the join date will show check there posts out .