Okay...
I am about an inch away from a sense of humour failure right now.
Aggregate, the OP (original poster) of the thread is NOT selling anything. You are the only one wishing him GLWS (good luck with sale) when there is in fact no sale taking place in this thread.
I highly doubt your account is being hacked because you would have raised an alarm about posts being made on your account that you yourself did not post.
Also, stop telling the OP that your are sorry for wishing him good luck on the sale of his car when there IS NO SALE...