Hello again TreasureHotel,
You can import multiple listings at a time via the Closed Listings page. You just have to click on the checkbox next to the thumbnail image and click on Import towards the top left of the page. Again, please advise we can only import listings that have not been deleted on eBay's end.
Listings that are imported can be edited in bulk using the Advanced Edit tool on the Saved Listings page. We can also post listings in bulk within the Saved Listings page.
If you have the listings created already you will have to search them by the title of the listing within the Saved Listings page.
If you are having difficulties with this please file a support ticket with the details and our team will get to you as soon as we can!