If your items are listed with Simple Delivery, then you are provided with a postage label by Ebay.
The label, which the buyer pays Ebay for, uses RM Tracked 48 (or Evri) and the value is covered for up to £750. This is different to what you would be able to purchase direct from Royal Mail and offers you and your buyer better cover for a lower price.
Although Ebay don't know the weight, they know what you are selling so can calculate the size of package required. The value is slightly irrelevant as the item is covered for up to £750. If you listed an item with a start price of more than £750, you would not be able to use Simple Delivery.
(Hopefully, you would not use Second Class signed for - this now only covers items worth up to £20.)
If the parcel is not delivered, or is damaged in transit, Ebay deal directly with the buyer's claim.
Simple Delivery is mandatory for private sellers. If you are going to continue selling on Ebay, you should set aside half an hour to read about it.
Use the link below, follow the links in the text and read the FAQs.
https://www.ebay.co.uk/help/selling/posting-items/setting-postage-options/simple-delivery?id=5575&st...
Hopefully, you would not use Second Class signed for - this now only covers items worth up to £20.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)