Hi trinkets,
No, it is not possible to link multiple Auctiva accounts to one eBay store. We also do not currently offer functionality that would allow you to provide limited access to an Auctiva account, but we will consider these ideas when planning future updates to our site.
If you need any further assistance with your account, please feel free to contact our Customer Support team by mousing over the “Help” tab on our site and selecting the “File Support Case” option.
-Mike