At this time, you can only edit item details individually.
You can edit your added attributes as well as the pricing of your items in bulk on your Inventory page as well as Manual Listings page. Select the items you would like to edit. On your Inventory page, you will see an Edit button at the top of the table.
On your Manual Listings page, you will see Edit Selected at the bottom of the table.
Either of these buttons will take you to where you can edit your attributes or pricing information for all selected items.
Update wholesale pricing in bulk: https://www.useloom.com/share/0fc8f365ca5f4ab1b8cc8582821fe2d6