I had a seller send me an empty box once. Yep that is right totally empty.
Paypal ruled in the sellers favor saying when they made an inquiry the seller was able to provide a tracking number and shipping date. Their point of view was I could not prove there was nothing in the box but he could prove something was sent. I know what you are thinking what the
BUT my credit card company backed me up and I got all of my $1500 back.
Maybe I did get lucky but my point was you are far better off using a credit card through paypal than not using one.