Ahh, yeah that sucks NOFUTURE ...that's pretty much true for any transaction that isn't done face-to-face.
Another one to watch out for (as a seller) is when the buyer reverses the charges after shipment or receipt.. either via Paypal, credit card or otherwise.
Either way, shitty lesson to learn the hard way, but now ya know Oh, also.. as far as selling BTC goes, I've had good luck with https://xcoins.io ...they call it "lending" BTC, but it's selling via Paypal.. they handle all the work legwork, and you get a bit more $ than the going rate.. just be sure to set the "Rating" field to 3 or more. One person attempted to scam me (via Paypal reversal), but xcoins caught it out.
Life is like a box of chocolates, it doesn't last as long for fat people.