PSS now supplies warranty item specific fields. This is managed in PSS eBay listing templates at the bottom of the template. The default setting is "No Warranty". If you wish to amend this you will need to go template by template and update the warranty selection. Buyers will be able to search for items based on these values both on the eBay platform and third party search engines , so it is critical that you update this information in order to stay competitive against other sellers on the site.