One more thing. When buying on the internet ALWAYS use a credit card. Not a debit card, but a credit card. In the US, at least, but likely in many other countries credit card purchases have a lot more protection than any other way of paying for something. I have been able to recover a year of monthly payments billed by an internet company that went belly up. I don't know if the bank that issued my card ate the $ $ $ or if they reversed the payments to that defunct company, but I got every penny back.
A debit card works differently. It is more like handing cash or a valid check to the seller. Much harder to reverse.
If you are defrauded in any purchase made with a credit card, you simply should make the issuing bank aware within 30 days and they take over. Oh, and this is one way to induce PayPal to keep things honest. If they don't issue the refund then the cc bank WILL. But if the purchase was funded via your bank account that you registered with PayPal, then once the money is transferred, it is a LOT harder to get back. There is an option to fund any PayPal purchase with a credit card, just look for it in the checkout.
Oh, and credit cards have a bonus; I get a 1.5% discount on every purchase and that includes tax and shipping. I receive at least $500 back, IN CASH, every year from my credit card purchases. I don't know about you, but I can certainly use that money - and I do use it. Some credit cards are even giving 2% back now. I can't get even 0.5% interest on a savings account.