From the Members Area > Selling > Seller Tools > Default Listing Settings page, you can set up the default settings to use when you create new listings. However, these settings will only affect new listings you create, and will not affect your existing listings.
If instead (or in addition) you want to bulk edit / update your existing listings, you can easily do this from the Members Area > Selling > Listings page. At the top left of the page, click on the drop-down menu connect to the first checkbox, and then select the "Select All XX Listings" option:
Then scroll to the bottom of the page and click on the "Bulk Edit" button. Once the Bulk Edit window appears, you will see most of the same fields you would when creating a new listing, or editing an individual listing; such as Shipping Costs, Enabling Offers, etc.
Click "Edit" next to and field you wish to change. Review your changes, and then click the "Submit" button.
Your listings will then be updated over the next few minutes with the changes you've indicated.
Video Overview Click Here for a Video Tutorial Overview of the Bulk Lister. Getting Started The Bulk Lister allows you to list and manage your items in bulk, using a CSV file. In general, you can list multiple items much quicker using the Bulk Lister ...
Bulk Lister - Advanced Usage
All Fields (Expert) Bulk Lister Template All fields in which you can set while creating an item individually through the Sell Your Item process can also be set through the Bulk Lister. In general, we recommend that you start with one of the (Basic) ...
Bulk Lister - Shipping Costs
Shipping Costs Overview From the Members Area > Selling > Seller Tools > Postage Setup page, you define what your Locations/Regions are. For example, the default Locations/Regions will be "Domestic", which will be set to your own country, and ...
Bulk Lister - Item Specifics
Item Specifics If you would like to provide value for Item Specifics, such as "Main Character", "Stamp Condition", etc., you can do so by adding the appropriate Item Specifics fields to your Bulk Lister CSV file. Review the Bulk Lister > Fields page: ...