You need to read the rules. No replies to For Sale threads, think of them as adverts only. Any advert will contain alternative contact info, such as a phone no or email address.
If your placing an advert, you need to follow the guidelines on making an advert. All adverts are moderated and approved by the moderator team as and when they get time. So though you may post an advert it won't appear straight away until its been approved.
If the advert doesn't follow the guidelines, it will not be approved.