Hi IMA,
Welcome to Auctiva! While we may support eh ability to use multiple eBay accounts from one Auctiva account with a future site update, you must currently have a separate Auctiva account for each eBay account. However, we will allow you to use all of your accounts while only paying the price of one account provided that you are using one of our plans that include unlimited listings. The least expensive unlimited listing plan is the Standard plan, which is $9.95 per month.
There is also a Premium plan available for $19.95 per month that includes an Auctiva Commerce (off eBay) store, a free custom domain, and some advanced support options.
If you would like to take us up on this offer, once you have created all 4 of your Auctiva accounts, please select the desired plan through one account and then contact our customer support team to have your other accounts combined under that one. Just let them know all of your Auctiva usernames and specify which one you have selected a plan for you, and they'll get them all set up.
You can reach our customer support team at any time by completing the form on the following page of our site: http://www.auctiva.com/help/requesthelp.aspx
-Mike