Simply create a seller details profile. In your Auctiva acct, Profiles tab>Seller Details. Then, in your listing, once you've selected a template you can apply the seller details. You can also set in your listing Profile to automatically select a template & seller details.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .