I charge $7.20 for all my postage so I am not paying the customer is... so really not a cost upon me... 

But the cheaper items that were not moving were bugging, I want them sold.. lol

If I send them in an envelope and they are lost I have charged enough to be able to resend and not be out of pocket... 

If they get lost a second time then I guess I refund and block the buyer...