Hi Arkady,
Yes, if you have subscribed to the Pro Plan through one Auctiva account, we will be able to arrange for you to use a second Auctiva account for a second eBay account at no additional charge as long as your original subscription remains active.
If you are interested in this offer, just file a support case from under the “Help” tab on our site and our Customer Support team will be able to help get your accounts set up in this manner.
-Mike