So buyer has responded to my first response to their initial message with the following "Hi (my name deleted), thanks for for prompt reply. I will contact the post office so we can attack with a pincer formation and have also sent a copy of your email to my frends who have taken a deep speculative interest in this event.
Regards, (buyers name deleted)".

It seems good that they are willing to go to the Post Office but a bit weird that they need to inform me they are letting friends know.