Using verified paypal, you can making chargeback and dispute anytime after you accept bitcoin.
+1
I'm sorry, but chances are slim to none you'll find anybody selling you any
BTC with paypal...
It's been said a couple times before, and i've tried it myself => the only real alternative is virwox, their fee is usually over 10%, and it can take up to 48 hours for your first withdrawal... But if you don't have any green trust on this site, it might be your only option.