Pay Pal
I agree! One thing is if you use Paypal they will try to work it out for you. I won a number of items on ebay from the same seller. When I asked for a combined invoice he said thats it. The order was for like $18.00 and the shipping was $32. In the end Paypal tried to get him to lower the shipping, but he wouldn't give in. I canceled. I later saw the items relisted at a higher price with shipping included.
Another time I received an order with postaage due. I contacted the seller and she said that it was a deal, and she wouldn't reimburse me for the shipping, even when I said I won't buy form her again. Some times you just have to bite the bullet, as I did.