Sorry to say, but most people won't trust you on this one. PayPal payments and credits can be reversed, bitcoin cannot. There have been lots of people that have been scammed out of their precious few BTC to trust anyone with PayPal anymore.
Yeah, I know, unfortunately. I don't really have any other way though, and trying to get BTC is an annoying ordeal. I can purchase a vanilla visa etc and sell that, but I'm sure I would run into the same sort of problems with that.