From post 5 - This contravenes eBay policy "Can't be held accountable for lost post."

 

Selling Practices

 

Postage & Handling time

 

What not to do

You should not:

  • Hold postage if PayPal places a temporary hold on payments you receive for an item you sold.

    Note: Holding postage may affect your detailed seller ratings and buyer satisfaction, which increases the chances of future PayPal payments being held.

  • Say that you're not responsible for item delivery, or for ensuring that the item is delivered. For example, these statements aren't allowed:

    • 'I'm not responsible for the item once it's been dropped in the mail'

    • 'I'm not responsible for items lost in the post'

    • 'Without insurance, I can't be responsible for items lost in the post'

 

http://pages.ebay.com.au/help/policies/selling-practices.html