Paypal is the most fraudulent company that I've done business with. There for I never sell anything anymore using it, purchase is ok but also risky. A friend of mine purchased an engine part on ebay but received a brick insted. Paypal then refused to give the money back because he had signed it out.
In total I've lost 1000's of dollars due to Paypal just handing it back to the fraudster. It doesn't matter what you say or what evidence you got. Me personally have never won a paypal dispute as a mercher.
My recommendation to other people, I know its a loss of customers but LibertyReserve, bitcoins or old fashion bankwire is as safe as it gets.