On the Post Offers page, fill out all of the information in the Post Offer box, including the zip code (if in U.S.). As you are posting the offer, the system will search for open needs that match your offer. If a need is found that matches your offer the need will be shown (so that you can meet that need with the offer you were about to post). If no need was found that matches the offer you want to make, fill out the form by entering a Description of the offer, an Expiration Date and an estimated Value of the item or services.