Posting to Craigslist is fast and simple. First, select your unlisted items with Craigslist. This can be done in two ways;
From the dashboard, click on Unlisted under the Craigslist options.
Alternatively, click Marketplaces drop down, then select Craigslist, and click on Unlisted.
Once you are at the screen of unlisted items, click the drop down for the box that says ‘—Select–’ and choose Prepare for Craigslist.
On the net screen, make sure to fill out your title and any relevant information. The location should automatically be pulled from your settings. That said, also make sure you are selecting the proper category, be it paid or unpaid. Fill in your description of the item and add any pictures you need to. Once you are ready, click Post.
If you select a paid category, the following will pop up, as Craigslist has a charge for them
This will prepare your items for listing and ask for your log in information.
If you see the error below, please reference this article for installing the software: Rockit Launcher