If you purchase using paypal and paying with a CC, Paypal may eventually disqualify you *IF* you go direct to a cc chargeback INSTEAD of using them FIRST.
On eBay, WATCH the Paypal protection offered by sellers, it will usually say $200 or $2000.
When selling ALWAYS USE DELIVERY CONFIRMATION of you're not protected. If you purchase an item over $250 get Signature Confirmation.