You can import many items at once with collections. Follow these steps:
- Find products you want to import, and press "Like" on those products
- Hit Edit on the popup that appears to add them to a specific collection or create a new collection.
- Once you're happy with the items in that collection, you may go to your "My Likes" page and hit "Import collection", which will import all the items in that collection.
- Duplicate items will only be updated, not create a new listing.