1. For sale threads are not editable by the poster. If you need a change made, please contact a moderator.
2, Thread should include price, pictures, contact info like email address. Try to not post a phone number. If you have less than 15 posts, you won't be able to reply by pm as newbies won't be able to pm the seller either since they also probably have less than the required 15 posts to do so.
3. Why are threads uneditable? In case of a dispute, the seller cannot go back and say something was X when it was Y, because the seller changed it in his favor.