I found this in the FAQ:
I've recently migrated nearly 200 items from evil greedBay, so I was happy to find this entry in the FAQ. The title says 'listings' PLURAL. This only tells me how to add a single listing to my store. My leg's being pulled, no way I'm going to do that for 50 or 100 listings, of course I want to know how to do it as a bulk operation. Grrrrr.33) How can I add my new and existing listings to my store?
To add your existing listings to your eBid store, go to "My eBid" > "Listings I'm Running", then click on the edit link to the right of the listing you wish to add to your store. From the edit page you can add the listing to your store by using the eBid store category dropdown menu in section One. To add a new listings to your store when posting a new listing, in Section One of the auction listing page select the store category/sub category from the drop down menu. Your store will need to be online to be able to select a category.
And don't even get me started on the typo "To add a new listings". The proofreading on this site is abysmal and there's little incentive to keep reporting such things, they rarely get fixed even when they've been mentioned multiple times over periods of months, as others have also remarked.
A lot of forum regulars love this site. That's a resource that's going to waste. If reports were acknowledged and acted on promptly there'd be much more free assistance.
OK, 'nuf said. Now I have to go and figure out for myself how to get things into my stores in bulk. Though I'm still not too sure that stores actually lead to increased sales. But clearly they can't diminish sales, so if it's easy enough I ought to try.