To complete the publication of an ad, click the yellow "Advertise" button in the top right corner of the site's home page.
To purchase a merchant package, click the "Buy a PRO Package" link at the top of the page.
To publish an ad with an available ad credit, click "MyPAC/My Bank," then on "Advertise" to the right of the ad you want to use.
Please note that you don't need to be a member to post an ad.