Hi Clarry,
Thanks for posting your question here. Although it is not currently possible to manage multiple eBay accounts through one Auctiva account so, you are certainly welcome to use Auctiva for your second eBay store by opening an additional Auctiva account.
Also, if at least one of your Auctiva accounts is subscribed to a plan which includes unlimited posting capabilities (such as our Elite or Pro Plans), you may qualify for our Multi Account Plan which could allow you to use your second account at no additional charge.
If you are interested in learning more about this offer, please contact our Customer Support team from under the "Help" tab within your account and we will be happy to discuss this with you in further detail.
-Mike