don't think paypal is safe even they advertized they guarantee your money back. It's all BS. As the previous post mentioned, pay only with your credit card if the seller has no references and if you got scammed, report to your credit card company and don't rely on paypal to help you.
Best to deal with someone with good heatware references over Ebay references.
If you feel uneasy about the deal, trust your instinct and skip the deal even if it's a great deal.