Well for one paypal charges a fee and also if a seller doesn't send you your merchandise they will not refund you your money. They do not protect the buyer. If the seller doesn't send you your merchandise you are out of luck.
yea its true about the fee, but I disagree with you about not protecting the buyer, I have had some issues before with sellers, and I've got my refunds from paypal.
anyways, good luck with your new cue
