How do i contact ebay online to tell them of a sellers death. I know she still had stuff on sale.

You don't, unless you are legally responsible for their affairs and are able to provide correct documentation as required.

I know of a seller that has died suddenly how do i notify Ebay online to tell them? | Membership & Account

I know of a seller that has died suddenly how do i notify Ebay online to tell them? | Membership & Account | eBay Australia