Until recently in order to push a Craigslist posting back to the top of the listings, one would have to delete it and then repost it, a many step process.
I noticed not long ago there is now a ‘renew’ link-button in the ‘manage’ column of options. When one clicks this renew link, the post is reposted to the top of the listings. This is a big time saver.
Thank you Craigslist.