So are you saying you're not charging the actual postage but "enough" to cover postage, i.e. making a profit on postage?
Don't really get that, you can proove you posted the discs but Paypal isn't interested in your evidence? Sorry, but can't believe that is the case.
If you want to find out how much insurance postage is why not simply check with the PO? They will be more able to tell you the exact postage rates than anyone on here...
That's not true if I understood the Ebay messages right. it's max. postage of $4 per item within USA, too many sellers tried to make profit on postage and charged too much.