I anticipate in a few years paypal will be making money in the same order of magnitude of countries around the world printing cash. There's no regulation to sales tax for paypal transaction and no comparable alternatives (except some countries have their own counterparts at smaller scales). The seller fee is ridiculous. There's not much protection as a seller or buyer. There must be countless scams around ebay and paypal and they are not a grown service like CC so don't expect them to have enough interest to help you out. After all, how else are you paying?