1). Include as much of your information as possible. Keep it safe for yourself as well. There is no need to plaster your phone number all over the forum, however stating that you will give it to a buyer at their request may help settle their nerves about dealing with you. Also try to get their number if they ask for yours and give them a call to show them you are legitimate.
2). Include photos of your products. This will help you to sell your items. People want to see what they are buying, if you post something for sale with no photos more than likely the first reply will be along the lines of “Pics.”
3). Be as specific and descriptive as possible. Try to make it clear the condition of the items you are selling as to avoid any problems after the buyer gets the product.
4). Post a price, this will help out you as the seller as well as the buyer. If all your post up is best offer do not complain when you get a bunch of low ball offers.