They only protect you if the seller has money in his account. My Friend bought a video card that was never sent. Ebay said that the seller did not have money in his account so there was nothing they could do. He was out $500 with no recourse.
Exactly this. Had to go through this situation. PayPal said they'll flag the account, but these accounts are already abandoned once the money is withdrawn.
In addition to my other comment. You want to pay by credit card since it has fraud protection. Never use PayPal credits or bank transfers or debit cards. Debit do have some protection, but usually have shorter time frame on when you need to report.
Well, that's kinda fine by me. If I'm out $1000 from a fraudulent lens purchase on eBay, and they/Paypal won't refund, then I'm fine not doing business with them anymore and recovering my $1k from credit charge back.