Hi tarheel_auto_accessories,
Yes, it is possible to create and schedule listings through Auctiva without having them be posted to eBay immediately. In order to create such a listing, you will need to fill out the Auctiva lister page which can be reached by mousing over the "Listings" tab within your account and then selecting the "Create New" option.
If you would like to schedule the listing to post at a later date/time once you are done, just click the blue "Schedule" button at the bottom of the page and you will be presented with the option to do so.
If you are not sure when you would like the item to be posted yet, just click the "Save" button instead. That would cause the listing details to be retained on your Saved Listings page and you could schedule or post the listing from there once your are ready to do so.
I hope this helps. If you need any additional answers to accomplish what you are looking to do, please feel free to contact our customer support team using the form on the following page of our site:
http://www.auctiva.com/help/requesthelp.aspx
-Mike